Click on a day for an hourly weather forecast
The temperatures in Nantes in September are comfortable with low of 13°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Nantes during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Nantes in September 2025.
If you’re planning to visit Nantes in the near future, we highly recommend that you review the 14 day weather forecast for Nantes before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 3° | 8 | 22 | 1 | 99 mm | Bad | Nantes in January |
| February | 10° / 3° | 7 | 20 | 1 | 96 mm | Bad | Nantes in February |
| March | 13° / 4° | 5 | 26 | 0 | 66 mm | Ok | Nantes in March |
| April | 16° / 6° | 4 | 25 | 0 | 67 mm | Good | Nantes in April |
| May | 19° / 9° | 5 | 26 | 0 | 74 mm | Good | Nantes in May |
| June | 22° / 13° | 5 | 25 | 0 | 76 mm | Good | Nantes in June |
| July | 24° / 15° | 4 | 27 | 0 | 56 mm | Perfect | Nantes in July |
| August | 25° / 14° | 3 | 28 | 0 | 50 mm | Perfect | Nantes in August |
| September | 23° / 13° | 3 | 27 | 0 | 47 mm | Perfect | Nantes in September |
| October | 18° / 10° | 6 | 25 | 0 | 87 mm | Good | Nantes in October |
| November | 13° / 7° | 7 | 23 | 0 | 112 mm | Bad | Nantes in November |
| December | 10° / 5° | 8 | 22 | 0 | 130 mm | Bad | Nantes in December |