Click on a day for an hourly weather forecast
The temperatures in Niort 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 Niort 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 Niort in September 2026.
If you’re planning to visit Niort in the near future, we highly recommend that you review the 14 day weather forecast for Niort before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 3° | 8 | 22 | 1 | 87 mm | Bad | Niort in January |
| February | 10° / 3° | 6 | 21 | 1 | 74 mm | Ok | Niort in February |
| March | 13° / 4° | 5 | 25 | 0 | 63 mm | Ok | Niort in March |
| April | 16° / 6° | 5 | 25 | 0 | 62 mm | Good | Niort in April |
| May | 19° / 9° | 7 | 25 | 0 | 97 mm | Ok | Niort in May |
| June | 22° / 13° | 5 | 25 | 0 | 86 mm | Good | Niort in June |
| July | 25° / 15° | 4 | 27 | 0 | 56 mm | Perfect | Niort in July |
| August | 26° / 15° | 2 | 29 | 0 | 40 mm | Perfect | Niort in August |
| September | 23° / 13° | 3 | 27 | 0 | 53 mm | Perfect | Niort in September |
| October | 18° / 10° | 5 | 26 | 0 | 74 mm | Good | Niort in October |
| November | 13° / 7° | 7 | 23 | 0 | 102 mm | Bad | Niort in November |
| December | 9° / 4° | 8 | 22 | 1 | 106 mm | Bad | Niort in December |