Rennes weather

Our guide to the weather in Rennes during December

9

Average high

2

UV Index

68mm

Monthly rainfall

7

Sea temperature

We've looked at the most up-to-date weather data for Rennes, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Rennes weather in December.

What's the temperature like in Rennes during December?

The temperature reaches around 9℃ during the daytime in December, falling away to 4℃ at night. The UV index will be low at this time of year, so not something to worry about. However, if you're going to be outside for long periods it's always a good idea to apply a small amount of sunscreen to exposed skin.

Does it snow in Rennes during December?

Possibly. There's a chance of snow during December but not as much as you might think. Check the local forecast before you leave home so that you can pack appropriate footwear and clothing.

Does it rain in Rennes during December?

On average, there will be 6 rainy days during the month, amounting to 68.1mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Rennes during December?

You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during December. With cool air temperatures, any breeze will feel cold.

Is it too cold to swim in the sea in Rennes during December?

The water around Rennes is a bracing 7℃ during December and is too cold for for swimming. Those who frequently swim in cold open water might want to take a very quick dip, but prolonged exposure could cause hypothermia. A winter wetsuit will allow longer exposure to the water.

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Weather in Rennes

Our month-by-month guide to the weather and climate in Rennes

8.4

Rennes weather in

January
9.3

Rennes weather in

February
12.2

Rennes weather in

March
15.0

Rennes weather in

April
17.7

Rennes weather in

May
21.3

Rennes weather in

June
23.8

Rennes weather in

July
23.8

Rennes weather in

August
21.8

Rennes weather in

September
17.2

Rennes weather in

October
12.3

Rennes weather in

November
9.4

Rennes weather in

December