Climate averages 1991–2020
Rennes weather
in October.
A mild, moderately wet month: the 6th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Rennes: daytime highs average 16.3°C and nights cool to about 9.7°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 69 mm of rain on roughly 11 days, which makes October a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 53 min on an average October day.
The nearest other city in this atlas is Nantes (100 km away). In October its highs average 16.9°C, 0.6°C warmer than Rennes, with 73 mm of rain.
Among the 57 cities listed in France, Rennes ranks joint 24th of 57 for the warmest October highs and joint 24th of 57 for the driest October (rainfall, lowest first). The mean October high of those 57 cities is 16.8°C; Rennes is 0.5°C cooler than that mean.
From October to November, average highs fall by 4.5°C to 11.8°C, and monthly rainfall falls from 69 mm to 65 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rennes climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.4°C3.3°C | 3.3°C | 64 | 11.2 | 8.89 h |
| February | 9.4°C2.9°C | 2.9°C | 53 | 9.9 | 10.210 h |
| March | 12.2°C4.6°C | 4.6°C | 52 | 10.5 | 11.912 h |
| April | 14.9°C6.3°C | 6.3°C | 58 | 11.1 | 13.614 h |
| May | 18.1°C9.5°C | 9.5°C | 63 | 10.8 | 15.215 h |
| June | 21.2°C12.4°C | 12.4°C | 53 | 9.0 | 16.016 h |
| July | 23.1°C14.2°C | 14.2°C | 46 | 7.8 | 15.616 h |
| August | 23.2°C14.3°C | 14.3°C | 46 | 8.2 | 14.314 h |
| September | 20.5°C12.2°C | 12.2°C | 49 | 8.2 | 12.613 h |
| October, selected | 16.3°C9.7°C | 9.7°C | 69 | 11.4 | 10.911 h |
| November | 11.8°C6.2°C | 6.2°C | 65 | 11.3 | 9.39 h |
| December | 8.8°C3.7°C | 3.7°C | 71 | 12.1 | 8.48 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Nantes in OctoberFrance · 100 kmHigh 16.9°C · Low 10.5°C · 73 mm rain
- Angers in OctoberFrance · 110 kmHigh 16.8°C · Low 10.0°C · 68 mm rain
- Saint Helier in OctoberJersey · 124 kmHigh 15.2°C · Low 12.9°C · 122 mm rain
- Le Mans in OctoberFrance · 140 kmHigh 16.3°C · Low 9.5°C · 69 mm rain
- Caen in OctoberFrance · 154 kmHigh 15.9°C · Low 9.9°C · 65 mm rain
- Tours in OctoberFrance · 195 kmHigh 17.0°C · Low 10.0°C · 68 mm rain
- Le Havre in OctoberFrance · 202 kmHigh 15.6°C · Low 10.8°C · 104 mm rain
- Brest, France in OctoberFrance · 210 kmHigh 15.2°C · Low 11.8°C · 92 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rennes) is explained once on the Rennes year overview and on the Sources, method and limits page.