- Kids stay & eat for free at Marriot Bonvoy
- Destinations include Europe, Middle East & Africa
- Valid for up to 2 adults & 2 kids aged up to 12
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
Recommended for Montana
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 UK
Below the Helena chart shows average maximum daytime temperature for Helena, Montana, USA and the UK (London).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
Compare more Helena weather >>
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