Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Helena Weather in September
September in Helena averages 22°C (72°F) during the day and 6°C (43°F) at night. The excellent conditions and moderate rainfall make it a solid month to visit.
Rainfall in Helena in September
Typically, about 9 days will experience rainfall, with an average of 34 mm (1.3 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Helena in September
Helena in September has excellent weather. Days reach 22°C (72°F) and nights cool to 6°C (43°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights fall to 6°C (43°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Helena in September
Expect a lot of sunshine this month, with about 254 hours of sun. These sunny conditions add to the overall experience.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Helena Temperature in September
Min Temperature
6°C (43°F)
Max Temperature
22°C (72°F)
Chance of Rain
31%
Precipitation
34 mm (1.3 in)
Rainy days
9 days
Humidity
54%
Sunshine
254 hours
Percentage Sunshine
68%
Helena Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Helena - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Helena in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Light rain is possible, so consider bringing a small umbrella or rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Helena in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Barbeque9/10 -
Camping5/10 -
Outdoor sports10/10
Helena 3-Day Forecast
More climate data for Helena
Temperature Rainfall Sunshine Humidity
See the full Helena climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
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Yosemite National Park is definitely worth a visit
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