Climate in Rennes

Rennes, France has a oceanic climate. The annual average temperature is about 12.5°C and the city receives roughly 781 mm of precipitation across 130 rainy days a year, with around 1181 hours of sunshine. The warmest month is Jul (highs near 21.2°C) and the coldest is Jan (lows near 3.8°C). These are deterministic, latitude- and region-based planning estimates — not a forecast or measured station data; check current conditions with an official meteorological service before travel.

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

Rennes is classified as Oceanic. This reflects its annual temperature range and the seasonal pattern of its rainfall.

Rennes receives about 781 mm of precipitation a year over roughly 130 rainy days. The wettest month is Dec and the driest is Jun.

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