Climate Insights for Rennes

The climate in Rennes is temperate. The average annual temperature is 12°C and approximately 762 mm of precipitation falls per year. Rennes receives a notable amount of rainfall throughout the year, including during its driest month. Rennes is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to 3°C.The climate in Rennes is temperate. The average annual temperature is 54°F and approximately 30 in of precipitation falls per year. Rennes receives a notable amount of rainfall throughout the year, including during its driest month. Rennes is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to 38°F.

Temperatures in Rennes vary considerably across the year, with a 21°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 24°C with a mean of 19°C. January is the coolest month, with minimum temperatures around 3°C and an average of 6°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.Temperatures in Rennes vary considerably across the year, with a 38°F difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 76°F with a mean of 67°F. January is the coolest month, with minimum temperatures around 38°F and an average of 43°F. On average, daily temperatures fluctuate by about 15°F between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°F shift in average temperatures.

Rennes is a relatively dry area, receiving approximately 762 mm of precipitation annually, which averages out to around 63 mm per month. The wettest month is October, averaging 80 mm of rainfall. June and January also tend to see above-average precipitation. The driest month is August, with just 42 mm. That's 38 mm less than October, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.Rennes is a relatively dry area, receiving approximately 30 in of precipitation annually, which averages out to around 2.5 in per month. The wettest month is October, averaging 3.1 in of rainfall. June and January also tend to see above-average precipitation. The driest month is August, with just 1.7 in. That's 1.5 in less than October, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Rennes is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 15km/h in winter, 13km/h in spring, 12km/h in summer, 13km/h in autumn.Rennes is moderately windy, with an average annual wind speed of 8mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 9mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in June, with average winds dropping to 7mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2mph between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 9mph in winter, 8mph in spring, 7mph in summer, 8mph in autumn.

The best time to visit Rennes is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 57 mm per month. By contrast, January can be quite cold with temperatures dropping to 3°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.The best time to visit Rennes is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 65°F with modest rainfall averaging 2.2 in per month. By contrast, January can be quite cold with temperatures dropping to 38°F. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Rennes based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for Rennes based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.