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Rennes Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rennes.
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Climate overview of Rennes
Rennes, Brittany, France, sees big temperature differences between seasons, with July peaking at 25°C (77°F) and January dropping to 10°C (50°F).
Rennes sees a moderate amount of rain/snowfall, totalling around 782 mm (31 in) per year. It experiences warm summers and cold winters, creating some seasonal variation. The most sunshine falls in June, with an average of 7.2 hours of daily sunshine.
Rennes Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rennes - and find the best time to visit.
Monthly Temperature in Rennes
Visitors to Rennes can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 25°C (77°F) in July, the warmest time of the year, to a chilly 10°C (50°F) during cooler months like January.
At night, you can expect temperatures ranging from 14°C (57°F) in July to around 3°C (37°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rennes
Generally, Rennes experiences moderate precipitation patterns, averaging 782 mm (31 in) yearly. Year-round, Rennes has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 78 mm (3.1 in), and the driest month, July, with 53 mm (2.1 in), is minimal. For more details, please visit our Rennes Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Rennes
Seasonal changes in sunshine hours are quite dramatic in Rennes. While June receives considerable daily sunshine with up to 7.2 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Rennes by Month
The city experiences its highest humidity in January, reaching 87%. In June, the humidity drops to its lowest level at 75%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Rennes
Conditions in Rennes are generally most comfortable in May, June, July, August and September. They are typically least comfortable in January and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
mixed
Mar
good
Apr
good
May
excellent
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
mixed
Dec
cold
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: June and July
- Fewest rainy days: June, July, August and September
- Seasonal pattern: Warm summers and cold winters
Frequently asked questions about the climate in Rennes
What is the best time to visit Rennes?
May, June, July, August and September typically offer the most optimal weather in Rennes. In contrast, January and December tend to have less optimal conditions. Rennes has warm summers and cold winters.
What temperatures can I expect in Rennes?
Daytime highs range from 10°C (50°F) in January to 25°C (77°F) in July. Nighttime lows range from 3°C (37°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Rennes get?
Annual rainfall is around 782 mm (31 in). December is the wettest month with 78 mm (3.1 in), while July is the driest with 53 mm (2.1 in).
How sunny is Rennes?
Rennes receives around 1,724 hours of sunshine per year. June is the sunniest month with 217 hours, while December is the cloudiest with just 68 hours.
Rennes 3-Day Forecast
Rennes on the map
Rennes is highlighted - select any city to see its climate.
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