Sun Valley weather in September
Mild and comfortable, with occasional showers. Average highs of 20°C and lows of 5°C, with around 6 rainy days expected throughout the month.
✦ This is a recommended month to visit Sun Valley. The combination of weather, atmosphere and experience is at its best.
Average high
20°C
Average low
5°C
Rainy days
6 days
Best months to visit
June, July, August, September
What to do in Sun Valley in September
Whatever the weather, Sun Valley rewards curious visitors. Here are some of the best ways to spend your time:
Ski or snowboard world-class terrain in winter
Mountain bike trails or hike in summer
Fly-fish pristine mountain streams
Relax at the outdoor heated Olympic-sized pool
Dine at fine restaurants in the village
Explore the historic lodge and its celebrity heritage
What to pack for September
Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.
Browse other months
January
-1C
Cold, with some rainy days.
February
0C
Cold, with occasional showers.
March
4C
Cold, with some rainy days.
April
7C
Cold, with occasional showers.
May
14C
Cool, with some rainy days.
Recommended
June
21C
Mild and comfortable, with occasional showers.
Recommended
July
27C
Warm and pleasant, and mostly sunny skies.
Recommended
August
26C
Warm and pleasant, with occasional showers.
Recommended
September (you are here)
20C
Mild and comfortable, with occasional showers.
October
12C
Cool, with occasional showers.
November
4C
Cold, with occasional showers.
December
-1C
Cold, with some rainy days.
Book your September trip to Sun Valley
Find hotels, tours and experiences for the perfect escape.
