Mild
Average highs are around 23°C, so days are mild rather than hot.
Weather Guide
Rennes, France Average Monthly Weather
Weather score33Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 16°C, sunshine averages 5h per day, and rainfall totals about 667mm. Sea temperatures average 13°C across the year.
Annual weather
Annual averages
Temp
16°C
Rain
667mm
Annual total
Sun
5h
Sea
13°C
Weather score
33
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 43mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 19°C, so the water can feel cool.
Map
Weather map
Compare Rennes, France with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August23°C average high
August is one of Rennes' warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August43mm average rain
August is one of Rennes' driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to October and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August7 hours average sun
August is brighter than Rennes' yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August19°C average sea
August is one of Rennes' warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
August55 weather score
August is one of Rennes' best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.