Montana weather in September 2020

Below are average maximum temperatures at popular destinations in Montana in September. Select a destination to see more weather parameters.

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The September weather guide for Montana 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.

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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 sunrise & sunset times for September 2020

Browse the sunrise & sunset times for Montana in September 2020. Select a month to view Montana sunrise & sunset times for the next twelve months. The Montana sunrise & sunset times shown below are for Helena.


Date Sunrise times Sunset times
Tuesday, 1st September 2020 06:49 20:06
Tuesday, 15th September 2020 07:07 19:39
Wednesday, 30th September 2020 07:26 19:09
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Metric (°C / mm)  |  Imperial (°F / inches)

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