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Great Falls climate guide
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Temperature in Great Falls (°C)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) |  -2 |
 3 |
 6 |
 13 |
 18 |
 23 |
 28 |
28 |
21 |
 15 |
7 |
0 |
| Min temperature (night-time) |  -12 |
 -8 |
-6 |
0 |
5 |
 9 |
12 |
11 |
6 |
2 |
-5 |
-10 |
Sunshine & Daylight in Great Falls
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily hours of sunshine | ||||||||||||
| Daily hours of daylight |  9 |
 10 |
 12 |
 14 |
 15 |
 16 |
15 |
14 |
 13 |
 11 |
9 |
9 |
Rainfall in Great Falls
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain |  9 |
7 |
9 |
9 |
 12 |
11 |
7 |
8 |
7 |
 5 |
6 |
9 |
| Average monthly rainfall (mm) |  20 |
14 |
 23 |
31 |
 63 |
71 |
34 |
36 |
26 |
19 |
16 |
18 |
More climate for Great Falls
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (Maximum) |  1 |
2 |
 3 |
5 |
 6 |
 8 |
8 |
7 |
5 |
3 |
1 |
1 |
| Heat & Humidity |  0 |
0 |
0 |
0 |
0 |
0 |
 L |
L |
0 |
0 |
0 |
0 |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
What's the climate like in Great Falls?
Great Falls has a cold semi arid climate with warm summers.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
The climate guide for Great Falls, Montana shows long term monthly 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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Metric (°C / mm) | Imperial (°F / inches)
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Where's hot in Montana?
Below are average maximum temperatures at popular destinations in Montana for next month - August. Select a destination to see the climate guide for all months of the year.
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