Climate in Rennes, France

Rennes, France has a oceanic climate. The annual average temperature is about 12.5°C, with around 1181 hours of sunshine; the national rainfall baseline is roughly 781 mm across 130 rainy days a year. The warmest month is Jul (highs near 21.2°C) and the coldest is Jan (lows near 3.8°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Rennes is classified as Oceanic. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for France — so cities in the same country usually share a zone.

The rainfall baseline for France is about 781 mm a year over roughly 130 rainy days, with the wettest month Dec and the driest Jun. This figure is not specific to Rennes: every city in France carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Rennes sees an estimated 1181 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Rennes are Jun, Jul, Aug. Conditions vary year to year — verify with a current forecast before booking.

Rennes has a climate comfort score of 71/100, a comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Bordeaux — Oceanic, comfort 71/100
• Climate in Toulouse — Oceanic, comfort 76/100
• Climate in Lyon — Oceanic, comfort 71/100