HAPPY VALLEY, OREGON, WEATHER: SEPTEMBER 2018

HAPPY VALLEY, OREGON, WEATHER: SEPTEMBER 2018

TEMPERATURES

It was a fairly warm start to the month as maximum temperatures reached above 70° through the first 10 days, with 4 of those days being ≥80°, and one peaking at 90°, the only such occurrence this month. From the 11th-24th, Maximums didn’t vary much at all, hovering in the mid 60s to low 70s each day, until a brief warm-up from the 25th-28th saw readings around 80°, cooling to the mid-to-upper 60s on the final two days of the month. Minimum Temperatures ranged only 12.9° through the month.

Average Monthly Maximum: 73.3°
Average Monthly Minimum:  50.9°
Monthly Mean:  62.1°

 

Monthly High Maximum: 90.4° (5th)
Monthly Low Maximum:  64.9° (16th)
Monthly Low Minimum:   44.8° (24th)
Monthly High Minimum:  57.7° (9th)

 

NUMBER OF DAYS:
Maximums ≥95°:    0
Maximums ≥90°:    1
Maximums ≥85°:    2
Maximums ≥80°:    5
Maximums ≥75°:  11
Maximums ≥70°: 17
Maximums ≥65°: 30
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Minimums ≤65°:  30
Minimums ≤60°:  30
Minimums ≤55°:  27
Minimums ≤50°: 14
Minimums ≤45°:   1

 

PRECIPITATION

The only fairly significant rain event occurred on the 11th-12th as 0.75″ was recorded (the most since June 8th-10th when 1.12″ was measured). In the three-month period, June 11th-Sept. 10th, a total of only 0.48″ was observed so this was a welcome amount. Four other minor events occurred this month but all were <0.20″. For the calendar-year ending Sept. 30th, the annual total is now at 23.48″. We will have to have quite a wet final three months to even get to normal.

Total Precipitation: 1.30″
Maximum Calendar Day: 0.49″ (12th)

 

NUMBER OF DAYS OF PRECIPITATION & ATMOSPHERIC PHENOMENA:
≥0.01″: 9
≥0.25″: 2
≥0.50″: 0
≥1.00″: 0
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Thunder: 0
Hail: 0
Fog: 10
Heavy Fog: 1
Snowfall ≥Trace: 0
Snowfall ≥0.1″: 0
Snowfall ≥1.0″: 0
Snow Depth ≥Trace: 0
Snow Depth ≥1.0″: 0

 

MISCELLANEOUS

The month saw 14 Clear, 13 Partly Cloudy, and only 3 Cloudy days. There was hardly any wind to speak of as the maximum gust was just 10 MPH on four separate days.

Link to the monthly Weather Form:  September 2018

Cover Photo: Partially obscured sunrise, 9/5/2018, 0650 Hrs.

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