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Weather & Climate
Umatilla, Oregon, United States
Overview
Climate data and monthly weather averages for Umatilla.
Key Metrics
Annual Avg
12.3°C
Summer Avg
23.2°C
Winter Avg
2.1°C
Record High
43°C
Record Low
-17.7°C
Annual Precipitation
277.6 mm
Avg Humidity
60%
Summer Humidity
43%
Winter Humidity
77%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 18.5° | 1.4° | -17.7° | 36.3 | 81% | 42 | 54.1 |
| Feb | 19.9° | 3.5° | -12.7° | 24.9 | 72% | 65 | 55.9 |
| Mar | 26.1° | 7.5° | -8.6° | 27.3 | 64% | 110 | 51 |
| Apr | 32.5° | 11.2° | -3.4° | 24.3 | 58% | 154 | 51.1 |
| May | 37.5° | 16.5° | 0.6° | 26.7 | 52% | 194 | 54.9 |
| Jun | 41.5° | 20.3° | 6.1° | 20.7 | 48% | 214 | 55.8 |
| Jul | 43° | 25.1° | 9.8° | 4 | 41% | 240 | 43.1 |
| Aug | 42.3° | 24.2° | 9.1° | 7.1 | 41% | 201 | 45.9 |
| Sep | 37.5° | 18.9° | 1.4° | 10.8 | 47% | 144 | 47.2 |
| Oct | 30.5° | 11.8° | -6.6° | 23.9 | 60% | 93 | 50.3 |
| Nov | 22° | 5.5° | -8.3° | 29.4 | 71% | 49 | 62.1 |
| Dec | 18.1° | 1.3° | -13.7° | 42.2 | 79% | 34 | 65 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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