Weather in Helena: May
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Average day temperature: | 58.4°F |
| Average night temperature: | 42.7°F | |
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Number of sunny days: | 14 days |
| Day length: | 14.4 - 15.6 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.3 in. | |
| more information | ||
14 days
forecast
forecast
| Helena |
weather in
June
June
| Helena |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 86°F. At the same time the lowest night temperature was 30°F. Daily and nightly averages during May were 66.3°F and 47.5°F.
Sunny, partly cloudy and cloudy days
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Helena in May is 1.3 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 6.0 mph It makes May one of the most windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 9.4.
Best time for vacation in Helena
Helena on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Helena
Local time: 10:42
October 29, thursday
1200
45°F
SW
2 mph
2 mph
1500
50°F
SW
3 mph
3 mph
1800
41°F
S
5 mph
5 mph
2100
32°F
SE
4 mph
4 mph
October 30, friday
0000
30°F
SE
2 mph
2 mph
0300
28°F
SE
2 mph
2 mph
0600
30°F
SE
2 mph
2 mph
0900
32°F
SE
1 mph
1 mph
