Weather in Rennes: May
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Average day temperature: | 62.8°F |
| Average night temperature: | 48.3°F | |
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Sea water temperature: | 55.2°F |
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Number of sunny days: | 9 days |
| Day length: | 14.5 - 15.8 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.8 in. | |
| more information | ||
14 days
forecast
forecast
| Rennes |
sea water
temperature
temperature
| Rennes |
Air temperature in May, °F
Show year:
2025
2024
2023
The highest day temperature during May of 2025 was 78°F. At the same time the lowest night temperature was 41°F. Daily and nightly averages during May were 64.7°F and 49.4°F.
Sea water temperature in Rennes in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 57.0°F. The highest and lowest sea temperatures during the month were 58.8°F and 55.0°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 Rennes in May is 1.6 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 9.2 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: 7.4.
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 08:49
December 05, friday
0900
39°F
N
7 mph
7 mph
1200
46°F
N
14 mph
14 mph
1500
45°F
NW
19 mph
19 mph
1800
50°F
N
22 mph
22 mph
2100
54°F
NE
12 mph
12 mph
December 06, saturday
0000
50°F
NE
15 mph
15 mph
0300
52°F
NE
17 mph
17 mph
0600
52°F
NE
18 mph
18 mph
