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Helena weather by month
Check out Helena weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.
Temperature in Helena (°C)
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Max temperature (daytime) | -1 |
3 |
6 |
12 |
18 |
23 |
28 |
28 |
20 |
14 |
5 |
0 |
Min temperature (night-time) | -13 |
-10 |
-6 |
-2 |
3 |
8 |
10 |
9 |
4 |
-1 |
-7 |
-12 |
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
Sunshine & Daylight in Helena
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 |
UV Index (Maximum) | 1 |
2 |
3 |
5 |
7 |
8 |
9 |
8 |
5 |
3 |
1 |
1 |
Rainfall in Helena
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of days with some rain | 9 |
7 |
10 |
9 |
11 |
10 |
7 |
8 |
7 |
6 |
8 |
9 |
Average monthly rainfall (mm) | 17 |
12 |
21 |
28 |
51 |
55 |
33 |
34 |
30 |
19 |
16 |
16 |
More about Helena
Helena by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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The climate guide for Montana (Helena) 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.
What's the climate like in Helena?
Helena has a cold semi arid climate with warm summers.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
Compare Helena with the USA
Below the Helena chart shows average maximum daytime temperature for Helena, Montana, USA and the USA (Washington).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
Compare more Helena weather >>
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