Weather in Rennes: January
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Average day temperature: | 46.2°F |
| Average night temperature: | 39.9°F | |
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Sea water temperature: | 48.5°F |
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Number of sunny days: | 5 days |
| Day length: | 8.4 - 9.5 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.7 in. | |
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forecast
| Rennes |
temperature
| Rennes |
Air temperature in January, °F
| Day temperature | Night temperature |
The highest day temperature during January of 2025 was 54°F. At the same time the lowest night temperature was 28°F. Daily and nightly averages during January were 44.9°F and 38.9°F.
Sea water temperature in Rennes in January, °F
The average sea water temperature in January of 2025 was 48.0°F. The highest and lowest sea temperatures during the month were 49.1°F and 46.9°F.
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
Mostly all days in January are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in Rennes in January is 1.6 in. Other months of the year show relatively similar values.
The average wind speed value in January is 10.2 mph It makes January one of the most windy months of the year.
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 January is: 3.5.
Best time for vacation in Rennes
Rennes on a weather map
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