Weather in Grand Marais: May
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Average day temperature: | 51.7°F |
| Average night temperature: | 43.3°F | |
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Sea water temperature: | 36.5°F |
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Number of sunny days: | 11 days |
| Day length: | 14.5 - 15.7 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.7 in. | |
| more information | ||
14 days
forecast
forecast
| Grand Marais |
sea water
temperature
temperature
| Grand Marais |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 66°F. At the same time the lowest night temperature was 32°F. Daily and nightly averages during May were 54.2°F and 44.2°F.
Sea water temperature in Grand Marais in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 36.5°F. The highest and lowest sea temperatures during the month were 40.1°F and 33.8°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in May is almost equal.
Precipitation total in May, in.
Precipitation total value in Grand Marais in May is 0.7 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 7.7 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 May is: 7.9.
Best time for vacation in Grand Marais
Grand Marais on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Grand Marais
Local time: 07:45
December 24, wednesday
0900
28°F
NW
2 mph
2 mph
1200
32°F
N
4 mph
4 mph
1500
34°F
NE
5 mph
5 mph
1800
30°F
SE
4 mph
4 mph
2100
28°F
S
7 mph
7 mph
December 25, thursday
0000
21°F
S
7 mph
7 mph
0300
18°F
S
7 mph
7 mph
0600
16°F
SW
6 mph
6 mph
