See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
17°
Clear
Feels Like: 17°
Min: 15°
Max: 25°
The next few hours will be clear, with today reaching 25°C and dropping to 13°C. The coming days will be partly cloudy starting in the evening.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:51
Sunrise
20:11
Sunset
Moon
Waxing Crescent
12:54
Moonrise
21:37
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
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Weather in Rennes today, September 15, 2026
Rennes starts September 15, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Cloud leads the morning, peaking close to 75% near 11:00. Sunshine has little room until later in the day.
Expect highs of 25°C and cooler readings close to 15°C. Moisture in the air spans 51%-98%, with the highest values around 08:00. Airflow remains manageable, reaching about 5.9 km/h around 16:00.
Afternoon skies stay clogged, peaking close to 100% near 13:00. The grey theme continues rather than clearing out. Visibility holds near 29.9 km, though it can fall to 1.8 km. Expect sunrise at 07:51, sunset at 20:11, and 12 hours 19 minutes of sunlight today overall.
Taken together, settled sunshine in Rennes on September 15, 2026 makes outdoor timing easier, with highs near 25°C.
Frequently asked questions about weather in Rennes
How warm does it get in Rennes?
The warmest month in Rennes is July, with average high temperatures of 24°C. The average temperature during this period is around 19°C.
How cold does it get in Rennes?
The coldest month in Rennes is January, with average low temperatures of 3°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Rennes?
The wettest month in Rennes is October, with an average of 80mm of precipitation.
What is the driest time of year in Rennes?
The driest month in Rennes is August, with an average of 42mm of precipitation.
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