Irrigon, OR
Climate overview — based on NOAA 1991-2020 normals from HERMISTON 2 NW, OR US.
Year-round temperatures (°F)
Climate summary
Irrigon has an annual average temperature of 51.9°F with about 8.8 inches of precipitation per year. The warmest month is July (average high 89.4°F), and the coldest is December (average low 25.7°F). January is typically the wettest month (1.28 in) and August the driest (0.17 in).
Best time to visit Irrigon
Full guide →Climate change signal
All-time records →192 of 366 (52.5%) of Irrigon'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.
| 1990s | 1 | |
| 2000s | 77 | |
| 2010s | 152 | |
| 2020s | 136 |
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 | 41.7°F | 26.0°F | 33.8°F | 1.28 in | — | 11 |
| February | 47.9°F | 26.3°F | 37.1°F | 0.84 in | — | 9 |
| March | 57.9°F | 31.3°F | 44.6°F | 0.80 in | — | 9 |
| April | 65.6°F | 37.2°F | 51.4°F | 0.78 in | — | 7 |
| May | 74.2°F | 44.9°F | 59.5°F | 0.87 in | — | 8 |
| June | 80.6°F | 51.4°F | 66.0°F | 0.65 in | — | 5 |
| July | 89.4°F | 56.1°F | 72.7°F | 0.24 in | — | 1 |
| August | 88.7°F | 53.8°F | 71.3°F | 0.17 in | — | 2 |
| September | 79.8°F | 45.6°F | 62.7°F | 0.26 in | — | 4 |
| October | 65.6°F | 36.2°F | 50.9°F | 0.84 in | — | 8 |
| November | 50.5°F | 29.1°F | 39.8°F | 1.05 in | — | 10 |
| December | 41.5°F | 25.7°F | 33.6°F | 1.04 in | — | 13 |
Climate twins of Irrigon
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).