Union Gap, WA
Climate overview — based on NOAA 1991-2020 normals from YAKIMA AIR TERMINAL, WA US.
Year-round temperatures (°F)
Climate summary
Union Gap has an annual average temperature of 50.8°F with about 8 inches of precipitation per year and 20.3 inches of snow. The warmest month is July (average high 89.9°F), and the coldest is December (average low 23.1°F). December is typically the wettest month (1.44 in) and July the driest (0.20 in). Snow typically falls from November through March.
Best time to visit Union Gap
Full guide →Climate change signal
All-time records →81 of 366 (22.1%) of Union Gap'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.
| 1940s | 29 | |
| 1950s | 41 | |
| 1960s | 34 | |
| 1970s | 47 | |
| 1980s | 34 | |
| 1990s | 32 | |
| 2000s | 32 | |
| 2010s | 76 | |
| 2020s | 41 |
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 | 24.0°F | 31.7°F | 1.19 in | 6.2 in | 10 |
| February | 47.2°F | 26.1°F | 36.6°F | 0.81 in | 2.7 in | 7 |
| March | 56.6°F | 30.2°F | 43.4°F | 0.64 in | 0.6 in | 7 |
| April | 64.7°F | 35.2°F | 49.9°F | 0.55 in | — | 6 |
| May | 74.1°F | 43.5°F | 58.8°F | 0.74 in | — | 6 |
| June | 80.7°F | 49.5°F | 65.1°F | 0.50 in | — | 5 |
| July | 89.9°F | 55.0°F | 72.4°F | 0.20 in | — | 2 |
| August | 88.5°F | 53.3°F | 70.9°F | 0.21 in | — | 2 |
| September | 79.4°F | 44.9°F | 62.2°F | 0.23 in | — | 3 |
| October | 64.4°F | 35.3°F | 49.8°F | 0.64 in | 0.1 in | 6 |
| November | 48.9°F | 27.2°F | 38.0°F | 0.86 in | 3.0 in | 8 |
| December | 38.2°F | 23.1°F | 30.6°F | 1.44 in | 7.7 in | 10 |
Climate twins of Union Gap
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).