Umatilla, OR
Climate overview — based on NOAA 1991-2020 normals from MCNARY DAM #2, OR US.
Year-round temperatures (°F)
Climate summary
Umatilla has an annual average temperature of 53.9°F with about 7.9 inches of precipitation per year. The warmest month is July (average high 88.5°F), and the coldest is January (average low 30.0°F). December is typically the wettest month (1.22 in) and July the driest (0.19 in).
Best time to visit Umatilla
Full guide →Climate change signal
All-time records →227 of 366 (62%) of Umatilla's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 2000s | 37 | |
| 2010s | 201 | |
| 2020s | 128 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 41.1°F | 30.0°F | 35.6°F | 0.88 in | — | 13 |
| February | 46.2°F | 31.7°F | 38.9°F | 0.70 in | — | 10 |
| March | 55.5°F | 35.2°F | 45.4°F | 0.76 in | — | 11 |
| April | 62.9°F | 41.5°F | 52.2°F | 0.70 in | — | 8 |
| May | 71.9°F | 48.1°F | 60.0°F | 0.75 in | — | 7 |
| June | 79.2°F | 54.3°F | 66.7°F | 0.45 in | — | 6 |
| July | 88.5°F | 60.5°F | 74.5°F | 0.19 in | — | 2 |
| August | 87.7°F | 60.8°F | 74.3°F | 0.25 in | — | 2 |
| September | 78.0°F | 53.4°F | 65.7°F | 0.40 in | — | 3 |
| October | 64.3°F | 44.1°F | 54.2°F | 0.74 in | — | 9 |
| November | 50.6°F | 35.3°F | 42.9°F | 0.87 in | — | 10 |
| December | 41.2°F | 30.7°F | 36.0°F | 1.22 in | — | 14 |
Climate twins of Umatilla
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).