HAPPY VALLEY, OREGON WEATHER: OCTOBER 2019
TEMPERATURES
This October never saw any really warm weather and overall temperatures averaged about 3.5° below Normal for the month. The highest Maximum Temperature for the entire month was only 66.1° (6th) while 20 days remained ≤60°, with the month’s coolest Maximum being only 42.2° on the 29th, more typical of mid-winter. Mainly due to the first half of the month being mostly sunny and fairly dry, Maximum Temperatures averaged 5.5° warmer than the second half but the Minimum Temperatures averaged nearly identically during both halves. There were periods of chilly Minimum Temperatures throughout the month, with very light frost seen on the 1st, heavier frost on the 9th but the coldest weather waited until month’s end. Overall, there were 9 days falling to ≤40° including the final 6 days, with Halloween actually having a killing freeze as it dipped to 31.5°, the first October at this location to reach ≤32° since this station was established in 2014.
PRECIPITATION
After an unusually wet September (4.20″), this October was quite dry in comparison as the total of 2.62″ was only 64% of the normal monthly average of 4.09″. The first 15 days of October only saw 0.52″ of rain, just 19.9% of the month’s total; the second half was more October-like as 9 days recorded measurable rain from the 16th-26th. Unexpected thunderstorms rolled through the area on the 26th, moving in the unusual direction northeast to southwest, accompanied by small hail for a few minutes in the evening and a very bright partial double rainbow that lasted for about 20 minutes. However, this was the last precipitation seen this month as a dry streak began, continuing into November.
≥0.25″: 5
≥0.50″: 1
≥1.00″: 0
MISCELLANEOUS
Sky Cover: October recorded 14 Clear, 10 Partly Cloudy, and 7 Cloudy days.
Barometric Pressure ranged from 30.48″ (23rd, 29th) to 29.62″ (19th).
Relative Humidity peaked at 99% (4th, 17th, 18th, 22nd, 23rd), and reached a Minimum of 29% (29th).
Dew Point went from 59° (7th, 8th) to 9° (29th).
HAPPY VALLEY WEATHER FORM: OCTOBER 2019
Cover Photo: Halloween Sunrise behind Mt. Hood from Happy Valley, October 31, 2019 at 0728 Hrs.