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Montana weather in September 2022
- 2020°C max day temperature
- 77 days with some rainfall
- 44°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 3030 mm of monthly rainfall
- 55 (Moderate) UV index
Below are average maximum temperatures at popular destinations in Montana in September. Select a destination to see more weather parameters.
Recommended for Montana
The September weather guide for Montana (Helena) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Montana in September?
Daytime temperatures usually reach 20°C in Helena, Montana in September, falling to 4°C at night.
How sunny is it in Montana in September?
There are normally 8 hours of bright sunshine each day in Helena, Montana in September - that's 66% of daylight hours.
Does it rain in Montana in September?
There are usually 7 days with some rain in Helena, Montana in September and the average monthly rainfall is 30mm.
Montana September sunrise & sunset times
Browse the sunrise and sunset times for Montana in September 2022. Select a month to view Montana sunrise and sunset times for the next 12 months. The Montana sunrise and sunset times shown below are for Helena.
|Date||Sunrise times||Sunset times|
|Thursday, 1st September 2022||06:48||20:07|
|Thursday, 15th September 2022||07:06||19:39|
|Friday, 30th September 2022||07:26||19:10|
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