Sun Valley, ID
Climate overview — based on NOAA 1991-2020 normals from KETCHUM RS, ID US.
Year-round temperatures (°F)
Climate summary
Sun Valley has an annual average temperature of 40.2°F with about 17.3 inches of precipitation per year and 102 inches of snow. The warmest month is July (average high 80.0°F), and the coldest is January (average low 8.0°F). December is typically the wettest month (2.57 in) and August the driest (0.50 in). Snow typically falls from October through May.
Best time to visit Sun Valley
Full guide →Climate change signal
All-time records →82 of 366 (22.4%) of Sun Valley'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.
| 1970s | 36 | |
| 1980s | 81 | |
| 1990s | 82 | |
| 2000s | 71 | |
| 2010s | 41 | |
| 2020s | 55 |
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 | 8.0°F | 19.6°F | 2.25 in | 27.0 in | 10 |
| February | 35.0°F | 11.1°F | 23.1°F | 1.88 in | 17.2 in | 9 |
| March | 42.6°F | 18.7°F | 30.6°F | 1.76 in | 10.5 in | 8 |
| April | 51.9°F | 26.9°F | 39.4°F | 1.17 in | 3.2 in | 7 |
| May | 61.6°F | 34.7°F | 48.2°F | 1.78 in | 0.2 in | 8 |
| June | 69.7°F | 39.9°F | 54.8°F | 1.26 in | — | 7 |
| July | 80.0°F | 45.1°F | 62.6°F | 0.55 in | — | 4 |
| August | 78.7°F | 43.5°F | 61.1°F | 0.50 in | — | 4 |
| September | 69.0°F | 36.1°F | 52.6°F | 1.01 in | — | 4 |
| October | 55.9°F | 27.7°F | 41.8°F | 1.40 in | 1.6 in | 5 |
| November | 41.2°F | 17.4°F | 29.3°F | 1.21 in | 10.3 in | 6 |
| December | 30.3°F | 9.2°F | 19.7°F | 2.57 in | 32.0 in | 11 |
Climate twins of Sun Valley
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).