Weather in Great Falls: May
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Average day temperature: | 62.4°F |
| Average night temperature: | 45.7°F | |
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Number of sunny days: | 13 days |
| Day length: | 14.5 - 15.7 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.3 in. | |
| more information | ||
14 days
forecast
forecast
| Great Falls |
weather in
June
June
| Great Falls |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 89°F. At the same time the lowest night temperature was 28°F. Daily and nightly averages during May were 68.0°F and 47.7°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 Great Falls 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 8.1 mph It makes May one of the least 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: 9.2.
Best time for vacation in Great Falls
Great Falls on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Great Falls
Local time: 03:17
September 19, saturday
0600
55°F
NE
2 mph
2 mph
0900
59°F
E
2 mph
2 mph
1200
64°F
SW
4 mph
4 mph
1500
70°F
SW
6 mph
6 mph
1800
68°F
SW
9 mph
9 mph
2100
59°F
NW
6 mph
6 mph
September 20, sunday
0000
55°F
N
4 mph
4 mph
0300
54°F
N
4 mph
4 mph
