Great Falls weather in September 2024

Expect 21°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Great Falls in September. Check more long-term weather averages for Great Falls in September before you book your next holiday to Montana in 2024/2025.

21
21°C max day temperature
8
8 hours of sunshine per day
7
7 days with some rainfall
6
6°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
26
26 mm of monthly rainfall
5
5 (Moderate) UV index

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The September weather guide for Montana (Great Falls) 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 Great Falls in September?

Daytime temperatures usually reach 21°C in Great Falls in September, falling to 6°C at night.

How sunny is it in Great Falls in September?

There are normally 8 hours of bright sunshine each day in Great Falls in September - that's 66% of daylight hours.

Does it rain in Great Falls in September?

There are usually 7 days with some rain in Great Falls in September and the average monthly rainfall is 26mm.

Great Falls September sunrise & sunset times

Browse the sunrise and sunset times for Great Falls in September 2024. Select a month to view Great Falls sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Sunday, 1st September 2024	06:45	20:04
Sunday, 15th September 2024	07:03	19:36
Monday, 30th September 2024	07:24	19:05

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Montana - quick facts
Flight time^✝	13 hours
Time difference	UK -7 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Montana Office of Tourism