Prosser, WA
Climate overview — based on NOAA 1991-2020 normals from PROSSER, WA US.
Year-round temperatures (°F)
Climate summary
Prosser has an annual average temperature of 53°F with about 8.7 inches of precipitation per year. The warmest month is July (average high 90.4°F), and the coldest is December (average low 26.3°F). December is typically the wettest month (1.33 in) and August the driest (0.16 in).
Best time to visit Prosser
Full guide →Climate change signal
All-time records →54 of 366 (14.8%) of Prosser'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.
| 1920s | 15 | |
| 1930s | 69 | |
| 1940s | 32 | |
| 1950s | 20 | |
| 1960s | 35 | |
| 1970s | 25 | |
| 1980s | 30 | |
| 1990s | 24 | |
| 2000s | 46 | |
| 2010s | 35 | |
| 2020s | 35 |
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 | 40.1°F | 26.8°F | 33.5°F | 1.24 in | — | 8 |
| February | 46.7°F | 28.6°F | 37.6°F | 0.90 in | — | 6 |
| March | 55.9°F | 34.9°F | 45.4°F | 0.69 in | — | 6 |
| April | 64.6°F | 39.9°F | 52.2°F | 0.74 in | — | 5 |
| May | 74.1°F | 47.9°F | 61.0°F | 0.88 in | — | 6 |
| June | 80.9°F | 53.6°F | 67.2°F | 0.68 in | — | 4 |
| July | 90.4°F | 59.5°F | 75.0°F | 0.21 in | — | 2 |
| August | 89.2°F | 57.7°F | 73.4°F | 0.16 in | — | 2 |
| September | 79.7°F | 50.1°F | 64.9°F | 0.27 in | — | 3 |
| October | 64.7°F | 40.8°F | 52.8°F | 0.77 in | — | 6 |
| November | 49.3°F | 31.7°F | 40.5°F | 0.86 in | — | 7 |
| December | 39.5°F | 26.3°F | 32.9°F | 1.33 in | — | 8 |
Climate twins of Prosser
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).