Climate averages 1991–2020
Nantes weather
in August.
A warm, moderately wet month: the warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Nantes: daytime highs average 23.9°C and nights cool to about 15.3°C. By daytime temperature it is the warmest month of the year.
Expect about 47 mm of rain on roughly 7 days, which makes August a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 15 min on an average August day.
The nearest other city in this atlas is Angers (81 km away). In August its highs average 24.5°C, 0.5°C warmer than Nantes, with 46 mm of rain.
Among the 57 cities listed in France, Nantes ranks joint 43rd of 57 for the warmest August highs and joint 16th of 57 for the driest August (rainfall, lowest first). The mean August high of those 57 cities is 25.0°C; Nantes is 1.0°C cooler than that mean.
From August to September, average highs fall by 2.7°C to 21.3°C, and monthly rainfall rises from 47 mm to 49 mm.
The annual picture
August 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
Nantes climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.9°C3.8°C | 3.8°C | 71 | 11.2 | 9.09 h |
| February | 9.7°C3.4°C | 3.4°C | 56 | 9.7 | 10.210 h |
| March | 12.5°C5.2°C | 5.2°C | 53 | 10.3 | 11.912 h |
| April | 15.1°C7.1°C | 7.1°C | 57 | 10.4 | 13.614 h |
| May | 18.4°C10.3°C | 10.3°C | 61 | 10.6 | 15.115 h |
| June | 21.7°C13.4°C | 13.4°C | 46 | 8.4 | 15.916 h |
| July | 23.7°C15.2°C | 15.2°C | 39 | 7.3 | 15.516 h |
| August, selected | 23.9°C15.3°C | 15.3°C | 47 | 7.3 | 14.214 h |
| September | 21.3°C13.0°C | 13.0°C | 49 | 7.4 | 12.613 h |
| October | 16.9°C10.5°C | 10.5°C | 73 | 11.4 | 10.911 h |
| November | 12.3°C6.8°C | 6.8°C | 70 | 11.3 | 9.49 h |
| December | 9.3°C4.3°C | 4.3°C | 79 | 11.4 | 8.69 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
August in nearby cities
- Angers in AugustFrance · 81 kmHigh 24.5°C · Low 15.2°C · 46 mm rain
- Rennes in AugustFrance · 100 kmHigh 23.2°C · Low 14.3°C · 46 mm rain
- La Rochelle in AugustFrance · 121 kmHigh 24.1°C · Low 16.9°C · 42 mm rain
- Le Mans in AugustFrance · 158 kmHigh 24.1°C · Low 14.9°C · 47 mm rain
- Poitiers in AugustFrance · 160 kmHigh 25.2°C · Low 15.5°C · 49 mm rain
- Tours in AugustFrance · 171 kmHigh 25.2°C · Low 15.7°C · 48 mm rain
- Saint Helier in AugustJersey · 223 kmHigh 18.5°C · Low 16.1°C · 63 mm rain
- Caen in AugustFrance · 236 kmHigh 22.6°C · Low 14.5°C · 60 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 Nantes) is explained once on the Nantes year overview and on the Sources, method and limits page.