Sun Valley Climate: Weather by Month and Best Time to Visit
Best months for Sun Valley: September, June, August.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 5°C | -5°C | 67 mm | 8 | – | – | 4.8 |
| February | 7°C | -4°C | 60 mm | 8 | – | – | 5.2 |
| March | 11°C | -2°C | 55 mm | 8 | – | – | 5.9 |
| April | 15°C | 1°C | 32 mm | 7 | – | – | 6.9 |
| May | 20°C | 5°C | 31 mm | 7 | – | – | 7.9 |
| June | 26°C | 10°C | 15 mm | 4 | – | – | 8.6 |
| July | 31°C | 14°C | 9 mm | 2 | – | – | 8.2 |
| August | 30°C | 13°C | 8 mm | 3 | – | – | 8.3 |
| September | 26°C | 10°C | 9 mm | 3 | – | – | 8.8 |
| October | 19°C | 4°C | 24 mm | 3 | – | – | 8.2 |
| November | 11°C | -1°C | 34 mm | 6 | – | – | 6.3 |
| December | 5°C | -6°C | 65 mm | 8 | – | – | 4.7 |