Climate in Rennes: average temperature by month
In Rennes the warmest month is July, with 23.3 °C on average in the afternoon; the coolest is January, with 9.5 °C.
The average of the weather stations Nantes-Bouguenais (107 km), Belle Ile - Le Talut (147 km) and Pte De La Hague (181 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 9.5 °C | 9.3 °C – 9.8 °C |
| February | 10.4 °C | 9.8 °C – 10.9 °C |
| March | 12.5 °C | 11.1 °C – 13.6 °C |
| April | 15.1 °C | 13.7 °C – 16.2 °C |
| May | 18.2 °C | 16.3 °C – 19.9 °C |
| June | 21.3 °C | 20.0 °C – 22.5 °C |
| July | 23.3 °C | 22.6 °C – 23.7 °C |
| August | 23.3 °C | 22.7 °C – 23.7 °C |
| September | 21.1 °C | 19.1 °C – 22.6 °C |
| October | 17.3 °C | 15.1 °C – 19.0 °C |
| November | 13.0 °C | 11.3 °C – 15.0 °C |
| December | 10.5 °C | 9.8 °C – 11.2 °C |