Boise weather in September
Warm and pleasant, and mostly sunny skies. Average highs of 27°C and lows of 13°C, with around 3 rainy days expected throughout the month.
✦ This is a recommended month to visit Boise. The combination of weather, atmosphere and experience is at its best.
Average high
27°C
Average low
13°C
Rainy days
3 days
Best months to visit
May, June, July, August, September
What to do in Boise in September
Whatever the weather, Boise rewards curious visitors. Here are some of the best ways to spend your time:
Bike or run the Boise Greenbelt along the river
Hike trails up the Boise Foothills for city views
Float the Boise River on tubes in summer
Explore downtown breweries and craft beer scene
Visit Bogus Basin ski resort nearby
Tour the State Capitol building and grounds
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
4C
Cold, with occasional showers.
February
7C
Cold, with occasional showers.
March
12C
Cool, with occasional showers.
April
17C
Cool, with occasional showers.
Recommended
May
22C
Mild and comfortable, with occasional showers.
Recommended
June
28C
Warm and pleasant, and mostly sunny skies.
Recommended
July
34C
Hot and humid, and mostly sunny skies.
Recommended
August
33C
Hot and humid, and mostly sunny skies.
Recommended
September (you are here)
27C
Warm and pleasant, and mostly sunny skies.
October
18C
Mild and comfortable, and mostly sunny skies.
November
9C
Cold, with occasional showers.
December
4C
Cold, with some rainy days.
Book your September trip to Boise
Find hotels, tours and experiences for the perfect escape.
