Rock Island, WA
Climate overview — based on NOAA 1991-2020 normals from WENATCHEE PANGBORN AP, WA US.
Year-round temperatures (°F)
Climate summary
Rock Island has an annual average temperature of 51.2°F with about 7.8 inches of precipitation per year. The warmest month is July (average high 87.6°F), and the coldest is January (average low 24.1°F). December is typically the wettest month (1.31 in) and August the driest (0.23 in).
Best time to visit Rock Island
Full guide →Climate change signal
All-time records →66 of 366 (18%) of Rock Island'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.
| 1950s | 2 | |
| 1960s | 70 | |
| 1970s | 56 | |
| 1980s | 43 | |
| 1990s | 67 | |
| 2000s | 33 | |
| 2010s | 61 | |
| 2020s | 34 |
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 | 33.6°F | 24.1°F | 28.9°F | 1.02 in | — | 9 |
| February | 41.6°F | 27.4°F | 34.5°F | 0.76 in | — | 7 |
| March | 52.5°F | 33.7°F | 43.1°F | 0.73 in | — | 6 |
| April | 61.8°F | 40.4°F | 51.1°F | 0.57 in | — | 5 |
| May | 71.6°F | 48.7°F | 60.1°F | 0.77 in | — | 6 |
| June | 78.2°F | 54.9°F | 66.5°F | 0.50 in | — | 5 |
| July | 87.6°F | 61.8°F | 74.7°F | 0.24 in | — | 3 |
| August | 86.4°F | 61.0°F | 73.7°F | 0.23 in | — | 2 |
| September | 76.7°F | 52.5°F | 64.6°F | 0.23 in | — | 3 |
| October | 60.5°F | 40.9°F | 50.7°F | 0.62 in | — | 6 |
| November | 43.8°F | 30.9°F | 37.4°F | 0.85 in | — | 8 |
| December | 33.4°F | 24.5°F | 29.0°F | 1.31 in | — | 11 |
Climate twins of Rock Island
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).