Helena weather in September
Mild and comfortable, with occasional showers. Average highs of 21°C and lows of 8°C, with around 6 rainy days expected throughout the month.
✦ This is a recommended month to visit Helena. The combination of weather, atmosphere and experience is at its best.
Average high
21°C
Average low
8°C
Rainy days
6 days
Best months to visit
June, July, August, September
What to do in Helena in September
Whatever the weather, Helena rewards curious visitors. Here are some of the best ways to spend your time:
Hike to Cathedral Peak for city views
Tour Victorian mansions in the historic district
Explore the Montana State Capitol building
Visit the Holter Museum of Art in a mansion
Hike King George Trail through ponderosa forest
Explore Last Chance Gulch's historic mining areas
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
0C
Cold, with occasional showers.
February
-1C
Cold, with occasional showers.
March
6C
Cold, with occasional showers.
April
11C
Cool, with occasional showers.
May
17C
Cool, with some rainy days.
Recommended
June
23C
Mild and comfortable, with some rainy days.
Recommended
July
29C
Warm and pleasant, and mostly sunny skies.
Recommended
August
28C
Warm and pleasant, and mostly sunny skies.
Recommended
September (you are here)
21C
Mild and comfortable, with occasional showers.
October
13C
Cool, with occasional showers.
November
5C
Cold, with occasional showers.
December
0C
Cold, with occasional showers.
Book your September trip to Helena
Find hotels, tours and experiences for the perfect escape.
