Union, OR
Climate overview — based on NOAA 1991-2020 normals from UNION, OR US.
Year-round temperatures (°F)
Climate summary
Union has an annual average temperature of 49°F with about 14.8 inches of precipitation per year and 16.2 inches of snow. The warmest month is August (average high 86.9°F), and the coldest is December (average low 25.1°F). May is typically the wettest month (2.47 in) and August the driest (0.46 in). Snow typically falls from November through April.
Best time to visit Union
Full guide →Climate change signal
All-time records →0 of 366 (0%) of Union'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.
| 1910s | 31 | |
| 1920s | 24 | |
| 1930s | 48 | |
| 1940s | 24 | |
| 1950s | 28 | |
| 1960s | 46 | |
| 1970s | 29 | |
| 1980s | 40 | |
| 1990s | 34 | |
| 2000s | 57 | |
| 2010s | 5 | |
| 2020s | 0 |
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 | 39.5°F | 25.4°F | 32.5°F | 1.19 in | 5.3 in | 13 |
| February | 44.5°F | 27.0°F | 35.7°F | 0.93 in | 2.9 in | 10 |
| March | 52.5°F | 30.7°F | 41.6°F | 1.26 in | 1.2 in | 11 |
| April | 58.9°F | 34.4°F | 46.6°F | 1.68 in | 0.4 in | 13 |
| May | 67.5°F | 41.4°F | 54.4°F | 2.47 in | 0.1 in | 13 |
| June | 74.4°F | 46.6°F | 60.5°F | 1.69 in | — | 10 |
| July | 85.8°F | 50.9°F | 68.3°F | 0.48 in | — | 4 |
| August | 86.9°F | 50.0°F | 68.5°F | 0.46 in | — | 4 |
| September | 77.1°F | 42.6°F | 59.8°F | 0.70 in | — | 5 |
| October | 62.7°F | 34.4°F | 48.5°F | 1.15 in | — | 9 |
| November | 47.9°F | 30.5°F | 39.2°F | 1.53 in | 1.4 in | 13 |
| December | 39.0°F | 25.1°F | 32.0°F | 1.22 in | 4.9 in | 12 |
Climate twins of Union
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).