Rennes weather
Our guide to the weather in Rennes during May
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 May.
What's the temperature like in Rennes during May?
The temperature reaches around 18℃ during the daytime in May, falling away to 8℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in Rennes during May?
On average, there will be 5 rainy days during the month, amounting to 71.0mm 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 May?
You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during May. With moderate air temperatures, any breeze will feel cool.
Is it too cold to swim in the sea in Rennes during May?
The water around Rennes is a bracing 14℃ during May and would be considered too cold for swimming. Those who are a bit more hardy or frequently swim in cooler open water might want to take a quick dip. A wetsuit would be advisable if you wish to spend longer than 5 minutes in the water.
Weather in Rennes
Our month-by-month guide to the weather and climate in Rennes
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