Rock River, WY
Climate overview — based on NOAA 1991-2020 normals from MEDICINE BOW, WY US.
Year-round temperatures (°F)
Climate summary
Rock River has an annual average temperature of 42.2°F with about 11.2 inches of precipitation per year and 51.7 inches of snow. The warmest month is July (average high 85.3°F), and the coldest is January (average low 10.3°F). May is typically the wettest month (1.74 in) and January the driest (0.41 in). Snow typically falls from September through May.
Best time to visit Rock River
Full guide →Climate change signal
All-time records →31 of 366 (8.5%) of Rock River'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 | 5 | |
| 1950s | 63 | |
| 1960s | 39 | |
| 1970s | 52 | |
| 1980s | 37 | |
| 1990s | 45 | |
| 2000s | 64 | |
| 2010s | 42 | |
| 2020s | 19 |
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 | 31.3°F | 10.3°F | 20.8°F | 0.41 in | 6.5 in | 6 |
| February | 34.8°F | 11.5°F | 23.1°F | 0.63 in | 7.9 in | 6 |
| March | 45.6°F | 18.1°F | 31.9°F | 0.72 in | 7.6 in | 6 |
| April | 55.1°F | 25.0°F | 40.0°F | 1.38 in | 7.3 in | 8 |
| May | 64.8°F | 33.3°F | 49.1°F | 1.74 in | 2.4 in | 10 |
| June | 77.4°F | 42.6°F | 60.0°F | 1.38 in | — | 8 |
| July | 85.3°F | 48.3°F | 66.8°F | 1.11 in | — | 7 |
| August | 83.0°F | 45.9°F | 64.4°F | 0.82 in | — | 8 |
| September | 73.6°F | 36.3°F | 55.0°F | 0.96 in | 1.2 in | 7 |
| October | 59.1°F | 26.7°F | 42.9°F | 1.01 in | 5.5 in | 7 |
| November | 42.8°F | 17.6°F | 30.2°F | 0.55 in | 6.5 in | 6 |
| December | 32.8°F | 10.7°F | 21.7°F | 0.49 in | 6.8 in | 7 |
Climate twins of Rock River
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).