HAPPY VALLEY, OREGON WEATHER: JUNE 2021

HAPPY VALLEY, OREGON WEATHER: JUNE 2021

TEMPERATURES

June Temperatures were, simply, unprecedented. Never before in the Pacific Northwest’s official weather records have temperatures vaulted to the extremes as they did in late June, 2021. Over the 3-day period 26th-28th, all-time records for any day of the year were established on each of those successive days for most Willamette Valley locations as Temperatures reached well-over 100° each of these 3 days, maxing out at 107° at this Happy Valley location but soaring to 116° at the Portland International Airport (PDX) and 117° at the Salem Airport (SLE – McNary). The month of June would have averaged far above the previous records of 2015 but the first half of the month was rather cool, helping offset the extremes later in this month. At this Happy Valley location, the Average Maximum Temperature was actually slightly below June 2015 (80.9° vs. 81.2°) but the Average Minimum Temperature was quite a bit higher (56.0° vs. 54.5°), resulting in a Mean Temperature of 68.4°, 0.5° warmer than 2015’s 67.9°.

Prior to 2021 here in Happy Valley (back to 2014), only one Minimum Temperature had ever remained ≥70° for a calendar day (70.8° on June 19, 2019) but we managed to do that twice this month with 72.1° and 72.2° on the 27th & 28th, the latter date requiring a bit of explanation. The 72.2° on the 28th occurred just prior to the end of the observation day (midnight) after an onshore wind shift brought cooler air in from the Pacific; the morning Minimum Temperature had only fallen to 80.9° before rising. In fact, during the early morning hours the lowest the temperature dropped to was 86.5° from 0128-0536 hours, even rising to 89.3° from 0401-0417 hours as a persistent dry, hot east wind out of the Columbia River Gorge kept the heat entrenched overnight before falling a bit after sunrise.  Quite a remarkable event.

Breaking June 2021 into halves, the Max/Min/Mean Temperatures were thus: 1st-15th: 72.7°/52.8°/62.7°; 16th-30th: 89.1°/59.2°/74.1°. The coolest period occurred 4th-15th with 9 of these 12 days having Maximum Temperatures remain ≤70°, averaging 68.7°/51.2°/59.9°. The greatest Diurnal Range was 36.4° on the 1st (94.4°/58.0°), the least was just 6.9° on the 13th, the wettest day of the month.

Average Monthly Maximum:  80.9°
Average Monthly Minimum:  56.0°
Monthly Mean:  68.4°
Monthly High Maximum: 107.0° (28th)
Monthly Low Minimum:  46.4° (7th)
Monthly Low Maximum: 61.5° (6th)
Monthly High Minimum: 72.2° (28th)
Monthly High Mean: 89.6° (28th)
Monthly Low Mean: 54.5° (6th)

 

NUMBER OF DAYS:
Maximums ≥100°: 3
Maximums ≥95°:   3
Maximums ≥90°:   7
Maximums ≥85°:  11
Maximums ≥80°:  16
Maximums ≥75°:  20
Maximums ≥65°:  28
————————–
Maximums ≤100°: 27
Maximums ≤95°:  27
Maximums ≤90°:  23
Maximums ≤85°:  20
Maximums ≤80°:  15
Maximums ≤75°:  10
Maximums ≤70°:   9
Maximums ≤65°:   2
Maximums ≤32°:   0
_________________________
Minimums ≤70°:  28
Minimums ≤65°:  27
Minimums ≤60:   23
Minimums ≤55°:  18
Minimums ≤50°:   8
Minimums ≤32°:   0

 

PRECIPITATION

All of this month’s measurable rain occurred within the 10-day period June 5th-14th, totaling 1.48″ (64% of the Normal June amount of 2.32”), with rain falling on 7 calendar days. The wettest period occurred when 0.71″ fell from 1820 hours on the 12th to 0700 hours on the 13th. The Maximum Rain Rate for the month was 2.26″/hour on the 14th at 1206 hours.

Total Monthly Precipitation: 1.48″
Maximum Observation-Day Amount: 0.71″ (12th-13th)
Maximum Precipitation Rate: 2.26″/Hour (1206 Hrs on the 14th)

 

NUMBER OF DAYS OF PRECIPITATION:
≥0.01″:  7
≥0.25″:  2
≥0.50″:  1
≥0.75″:  0
≥1.00″:  0
_________________________
NUMBER OF DAYS OF ATMOSPHERIC PHENOMENA:
Thunder: 0
Hail:   0
Fog:  4 
Heavy Fog: 3 (Visibility ≤1/4 Mile)
Glaze (Freezing Rain): 0
Sleet (Ice Pellets):
_________________________
NUMBER OF DAYS OF SNOWFALL/SLEET & SNOW DEPTH
(as measured at 2400-hour observation time):
Snowfall ≥Trace: 0
Snowfall ≥0.1″: 0
Snowfall ≥1.0″: 0
Snow Depth ≥Trace: 0
Snow Depth ≥0.1″: 0
Snow Depth ≥1.0″: 0

 

MISCELLANEOUS

Sky Cover: 18 Clear, 8 Partly Cloudy, and only 4 Cloudy days.

Barometric Pressure: Average Maximum/Minimum Barometer readings were 30.04″/29.88″, with the Highest Daily Value of 30.36” on the 15th, the Lowest Daily Reading of 29.50” on the 28th.

Relative Humidity: Maximum/Minimum Relative Humidity Averages were 93%/47%, having a Daily Maximum of 99% on the 13th & 14th, Daily Minimum of 21% on the 28th.

Dew Point: Average Dew Points were a Maximum/Minimum of 64°/51°, with a Daily Maximum of 76° on the 26th & 28th, Daily Minimum of 40° on the 7th.

Wind:  Average of 1.0 MPH, with the highest gust reaching 24 MPH from the SSW on the 28th.

 

HAPPY VALLEY MONTHLY WEATHER FORM: JUNE 2021 (click the month/year to link to the form)

 

Cover Photo: Wilted Hydrangea from extreme heat (even with watering), 6/28/2021.

==================================================================

 

WILLAMETTE VALLEY/PORTLAND-VANCOUVER METRO AREA NEW JUNE & ALL-TIME RECORDS (NWS-Portland Reports):

 

RECORDS PRIOR TO THE EXTREME HEAT WAVE OF JUNE 26-28, 2021:

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE PORTLAND OREGON

502 AM PDT TUE JUN 22 2021 …

RECORD DAILY HIGHS FOR 21 JUNE…

RECORD WARMTH FOR THE FIRST FULL DAY OF SUMMER. MANY LOCATIONS WERE WELL INTO THE 90S ON MONDAY. HERE ARE THOSE SITES THAT SET OR TIED NEW RECORDS FOR THE 21ST OF JUNE.

A RECORD HIGH TEMPERATURE OF 97 WAS SET AT PORTLAND AIRPORT YESTERDAY. THIS BREAKS THE OLD RECORD OF 96 SET IN 1992.

A RECORD HIGH TEMPERATURE OF 95 WAS SET AT VANCOUVER WASHINGTON YESTERDAY. THIS BREAKS THE OLD RECORD OF 91 SET IN 1938.

A RECORD HIGH TEMPERATURE OF 96 WAS SET AT DOWNTOWN PORTLAND YESTERDAY. THIS TIES THE OLD RECORD OF 96 SET IN 1990. A RECORD HIGH TEMPERATURE OF 95 WAS SET AT HILLSBORO,  OREGON YESTERDAY. THIS TIES THE OLD RECORD OF 95 SET IN 1958.

==================================================================

RECORDS DURING THE EXTREME HEAT WAVE OF JUNE 26-28, 2021:

RECORD EVENT REPORT…CORRECTED

NATIONAL WEATHER SERVICE PORTLAND OREGON

708 PM PDT SAT JUN 26 2021

*PRELIMINARY …MULTIPLE MONTHLY TEMPERATURE RECORDS SET FOR JUNE… 

OBSERVED  LOCATIONS        HIGH TEMP     OLD RECORD (YEAR)

VANCOUVER, WA                                105 (TIED)               105 (2014)

PORTLAND AIRPORT                         108                            102 (2006)

PORTLAND DOWNTOWN                 106                            102 (1942)

TROUTDALE                                        109                           104 (1992)

HILLSBORO                                          105 (TIED)             105 (1992)

SALEM                                                   105 (TIED)             105 (1992)

EUGENE                                                103                          102 (1992)

==================================================================

 

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE PORTLAND OREGON

340 AM PDT Sun JUN 27 2021

…RECORD BREAKING HOT WEATHER…

An unusually warm air mass across the Pacific Northwest brought hot temperatures to much of the region. More records will likely fall over the next few days as expect little change in the weather pattern. With the current forecast, it is possible that some stations that just exceeded their all-time highest temperatures may do this again today or possibly Monday. Here are the records that were broken on Saturday, with the period of record for each station listed at the bottom.

HOTTEST DAY EVER RECORDED (ALL-TIME RECORD HIGHS)… 

OBSERVATION SITE                  26 JUNE HIGH       PREV. ALL-TIME RECORD

TROUTDALE, OR                             109 DEG ***NEW***      108  / 17 Aug 1977

PORTLAND, OR (AIRPORT)           108 DEG ***NEW***      107  /  8 Aug 1981/ 10 Aug 1981/ 30 Jul 1965

VANCOUVER, WA                            108 DEG ***TIED***      108  / 29 JUL 2009

__________________________________________________________________________________

HOTTEST DAY EVER RECORDED IN MONTH OF JUNE… 

OBSERVATION SITE               26 JUNE HIGH TEMP     PREVIOUS JUNE RECORD

TROUTDALE                                              109 deg ***NEW***        104  / 22 JUN 1992

VANCOUVER, WA                                      108 deg ***NEW***        105  / 30 JUN 1942

PORTLAND (AIRPORT)                            108 deg ***NEW***        102  / 26 JUN 2006

PORTLAND (DOWNTOWN)                    106 deg ***NEW***        102  / 30 JUN 1942

HILLSBORO                                                106 deg ***NEW***        102  / 26 JUN 2006

CORVALLIS                                                  103 deg ***NEW***        102  / 27 JUN 2006/ 23 JUN 1993/ 24 JUN 1925

EUGENE                                                      103 deg ***NEW***        102  / 22 JUN 1992

SALEM                                                          105 deg ***TIED***         105  / 22 JUN 1992

__________________________________________________________________________________

HOTTEST 26 JUNE (DAILY RECORD FOR 26 JUNE)… 

OBSERVATION SITE                 26 JUNE HIGH TEMP    PREVIOUS 26 JUN RECORD

TROUTDALE                                               109 deg ***NEW***        102  / 26 JUN 2006

VANCOUVER, WA                                       108 deg ***NEW***        101  / 26 JUN 2006

PORTLAND (AIRPORT)                             108 deg ***NEW***        102  / 26 JUN 2006

PORTLAND (DOWNTOWN)                     106 deg ***NEW***         101  / 26 JUN 2006

HILLSBORO                                                 106 deg ***NEW***        102  / 26 JUN 2006

SALEM                                                          105 deg ***NEW***         103  / 26 JUN 2006

MCMINNVILLE                                            104 deg ***NEW***         103  / 26 JUN 2006

CORVALLIS                                                   103 deg ***NEW***          99  / 26 JUN 2006

EUGENE                                                      103 deg ***NEW***          98  / 26 JUN 2015

HOOD RIVER                                               104 deg ***TIED***        104  / 26 JUN 2015

__________________________________________________________________________________

Station Period of Record…Portland Airport  1940-2021 

McMinnville                1894-2021

Portland downtown  1874-2021

Salem                            1892-2021

Vancouver, WA           1892-2021

Corvallis                      1893-2021

Troutdale                    1948-2021

Eugene                         1892-2021

Hillsboro                      1929-2021

Hood River                  1892-2021

==================================================================

 

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE PORTLAND ORE

720 PM PDT Sun Jun 27 2021 …

ALL TIME HOTTEST TEMPERATURES ON RECORD SUNDAY JUNE 27TH 2021…

A record smashing heatwave has overtaken the Pacific Northwest this weekend. Several sites squeaked past their all time highest temperature on record on Saturday with many others breaking their warmest June day on record. However, all of these sites heated up even more on Sunday June 27th 2021 and either tied or broke their all time warmest temperature on record for any month of the year. This includes a number of sites such as downtown Portland, Salem and Eugene where data goes back to the late 1800s. Given these were the warmest temperatures observed at any point during the year since records began, they are by default the new records for June and more specifically June 27th. There is a chance that some of these sites will make a second or third run at their all time record high temperature on Monday and surpass these Sunday numbers. * Given the Portland Airport, Troutdale and Vancouver set their all time hottest temperature on record on Saturday, their record warm temperature prior to Saturday June 26th is also included in the statistics below…

__________________________________________________________________________________

                                                             PREVIOUS ALL-TIME

                                                                  RECORD HIGH             RECORDS

OBSERVATION SITE    27 JUNE HIGH    TEMPERATURE / DATE      KEPT SINCE

ASTORIA                                            101F   TIED                    101F /  1 JUL 1942                         1887

CORVALLIS                                        110F                                109F /  8 JUL 1905                         1893

EUGENE                                            111F                                108F /  9 AUG 1981                       1892

HILLSBORO                                       109F                                108F / 21 JUL 2006                       1929

                                                                                                              / 19 JUL 1956

HOOD RIVER                                     108F   TIED                   108F / 18 AUG 1977                       1894

MCMINNVILLE                                  111F                                 110F / 10 JUL 1926                       1894

                                                                                                              /  9 JUL 1926

                                                                                                              / 24 JUN 1925

                                                                                                              / 24 JUL 1924

PORTLAND AIRPORT                      112F                                108F / 26 JUN 2021                       1940

                                                                                                      107F /  8 AUG 1981

                                                                                                              / 10 AUG 1981

                                                                                                              / 30 JUL 1965

PORTLAND DOWNTOWN             110F                                 107F /  2 JUL 1942                           1874

SALEM                                               113F                                108F /  9 AUG 1981                         1892

                                                                                                              / 15 JUL 1941

                                                                                                              / 23 JUL 1927

TROUTDALE                                     112F                                 109F / 26 JUN 2021                        1948

                                                                                                      108F / 17 AUG 1977

VANCOUVER                                    112F                                  108F / 26 JUN 2021                        1892

                                                                                                              / 29 JUL 2009

===================================================================

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE MEDFORD ON BEHALF OF PORTLAND OREGON

720 PM PDT MON JUN 28 2021 …

ALL TIME HOTTEST TEMPERATURES ON RECORD SUNDAY JUNE 27TH 2021…

THE RECORD SMASHING HEATWAVE HAS CONTINUED OVER THE PACIFIC NORTHWEST THIS WEEK. SEVERAL SITES ENDED THE DAY WITH ADDITIONAL ALL-TIME RECORDS,MANY OF WHICH WERE SET JUST YESTERDAY. INTERESTINGLY ENOUGH, PORTLAND AIRPORT; VANCOUVER, WA; AND TROUTDALE, OR RECORDED THEIR 3RD CONSECUTIVE DAY OF ALL-TIME HIGH TEMPERATURES. GIVEN THAT THESE WERE THE WARMEST TEMPERATURES OBSERVED AT ANY POINT DURING THE YEAR SINCE RECORDS BEGAN,THEY ARE BY DEFAULT THE NEW RECORDS FOR JUNE, AND SPECIFICALLY JUNE 28TH.TODAY SHOULD BE THE LAST DAY FOR THE EXTREME HEAT WITH TEMPERATURES COOLING OFF INTO THE 90S INLAND TOMORROW. * GIVEN THE PORTLAND AIRPORT, TROUTDALE AND VANCOUVER SET THEIR ALL TIME HOTTEST TEMPERATURE ON RECORD ON SATURDAY, THEIR RECORD WARM TEMPERATURE PRIOR TO SATURDAY JUNE 26TH IS ALSO INCLUDED IN THE STATISTICS BELOW…

__________________________________________________________________________________

     

                                                             PREVIOUS ALL-TIME

                                                                  RECORD HIGH              RECORDS

OBSERVATION SITE    28 JUNE HIGH    TEMPERATURE / DATE      KEPT SINCE

HILLSBORO                                           114F                                109F / 27 JUN 2021                  1929

HOOD RIVER                                        109F                                108F / 18 AUG 1977                  1894

                                                                                                                  / 27 JUN  2021

MCMINNVILLE                                     114F                                 111F / 27 JUN 2021                   1894

PORTLAND AIRPORT                         116F                                 112F / 27 JUN 2021                   1940

                                                                                                         108F / 26 JUN 2021

PORTLAND DOWNTOWN                 114F                                  110F / 27 JUN 2021                   1874

SALEM                                                   117F                                  113F / 27 JUN 2021                  1892

TROUTDALE                                        116F                                  112F / 27 JUN 2021                   1948

                                                                                                          109F / 26 JUN 2021

VANCOUVER                                        115F                                  112F / 27 JUN 2021                    1892

                                                                                                           108F / 26 JUN 2021

                                                                                                                    / 29 JUL 2009

==================================================================

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE PORTLAND OREGON

325 AM PDT TUE Jun 29 2021

…NEW ALL-TIME HIGHEST RECORDED TEMPERATURES… 

The heat wave has released its grip on areas west of the Cascades.But, in its wake, there were many long-standing temperature records broken. All-time highest temperaure records were broken in many locations, and in some cases, multiple times. These are not just simply new daily temperature records. Rather, these are the highest temperatures ever recorded since local weather records began.

It may take some time to confirm, but at this point, it appears the 117 deg high temperature set in Salem Monday afternoon is now the highest recorded temperature west of the Cascades in the Pacific NW.

Below is a list of locations that broke their all-time highest temperature records for any day, at any time of the year:

                          HIGHS MONDAY        PREVIOUS              

LOCATION              28 JUNE 2021     ALL-TIME RECORD

Salem                                    117 deg F                 113 / 27 JUN 2021

Portland Airport                116 deg F                  112 / 27 JUN 2021

Troutdale                             116 deg F                 112 / 27 JUN 2021

Vancouver, WA                   115 deg F                 112 / 27 JUN 2021

Portland Downtown          114 deg F                 110 / 27 JUN 2021

Hillsboro                               114 deg F                109 / 27 JUN 2021

McMinnville                         114 deg F                 111 / 27 JUN 2021

Hood River                           109 deg F                 109 / 27 JUN 2021

Note:  each location listed above just set new all-time high temperatures on Sunday, which were then superseded on Monday.  For reference, the all-time highest temperature records prior to the beginning of this heat wave are listed below.

                              PRIOR HIGHEST           PRIOR RECORD              

 LOCATION        TEMP RECORD & DATE      EXCEEDED BY

Salem                              108 /  9 Aug 1981                             +9 deg F

Portland Airport           107 / 10 Aug 1981                           +9 deg F

Troutdale                       108 / 17 Aug 1977                            +8 deg F

Vancouver, WA             108 / 29 Jul 2009                              +7 deg F

Portland Downtown    107 /  2 Jul 1942                               +7 deg F

Hillsboro                         108 / 21 Jul 2006                             +6 deg F

McMinnville                   110 / 10 Jul 1926                             +4 deg F

Hood River                     108 / 18 Aug 1977                           +1 deg F

Eugene broke their all-time record on Sunday, but was much cooler today. Astoria tied their all-time record on Sunday, but was also much cooler on Monday. Please refer to earlier record reports for further information on those locations.

_____________________________________________________________________

Station Period of Record…  

Portland Airport  1940-2021

McMinnville  1894-2021

Portland Downtown 1874-2021

Salem        1892-2021

Vancouver, WA     1892-2021

Troutdale    1948-2021

Hillsboro         1929-2021

Hood River   1894-2021

==================================================================

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE PORTLAND OREGON

1236 PM PDT TUE Jun 29 2021

…ALL-TIME CALENDAR DAY MAXIMUM LOW TEMPERATURE RECORD BROKEN… 

A new record has been broken for the all-time calendar day maximum low temperature. At Portland International Airport, the low temperature of 75 deg F occurred yesterday, June 28th 2021. This breaks the previous maximum low temperature record of 74 deg F, which was met three different times.

                      NEW ALL-TIME MAXIMUM LOW      PREVIOUS RECORD                

LOCATION               CALENDAR DAY TEMP                 (74 deg F)

——————————————————————

Portland Airport                            75 deg F                                             28 July 2009

                                                                                                                       22 July 2006

                                                                                                                       17 July 1941

Station Period of Record…

Portland Airport  1940-2021

==================================================================

RECORD EVENT REPORT

NATIONAL WEATHER SERVICE PORTLAND OREGON

450 AM PDT FRI JUL 2 2021

…HIGHEST AVERAGE JUNE TEMPERATURE RECORDS BROKEN…                         

                                         JUN 2021                   PREVIOUS            

LOCATION                   AVG TEMP (DEG F)       RECORD / YEAR

——————————————————————

PORTLAND AIRPORT                               70.7                              70.3 / 2015

TROUTDALE                                              70.3                              69.5 / 2015

VANCOUVER, WA                                      69.7                              69.3 / 2015

SALEM                                                         69.5                              69.3 / 2015

——————————————————————

Station Period of Record…  

Portland Airport   1940-2021

Salem                      1892-2021

Vancouver, WA     1892-2021

Troutdale               1948-2021

==================================================================

 

Leave a Reply

Your email address will not be published. Required fields are marked *