Weather in Helena: August
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Average day temperature: | 78.0°F |
| Average night temperature: | 57.4°F | |
 |
Number of sunny days: | 21 days |
| Day length: | 13.4 - 14.8 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.5 in. | |
| more information | ||
14 days
forecast
forecast
| Helena |
weather in
September
September
| Helena |
Air temperature in August, °F
Show year:
2026
2025
2024
The highest day temperature during August of 2026 was 94°F. At the same time the lowest night temperature was 49°F. Daily and nightly averages during August were 81.1°F and 59.1°F.
Sunny, partly cloudy and cloudy days
Mostly all days in August are sunny but cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Helena in August is 0.5 in. Other months of the year show relatively similar values.
Wind speed in August, mph
The average wind speed value in August is 4.9 mph
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 August is: 10.8.
Best time for vacation in Helena
Helena on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Helena
Local time: 03:16
September 19, saturday
0600
50°F
SE
4 mph
4 mph
0900
50°F
S
4 mph
4 mph
1200
50°F
S
4 mph
4 mph
1500
52°F
S
4 mph
4 mph
1800
52°F
NE
1 mph
1 mph
2100
50°F
N
2 mph
2 mph
September 20, sunday
0000
48°F
NE
4 mph
4 mph
0300
46°F
NE
5 mph
5 mph
