Click on a day for an hourly weather forecast
The temperatures in La Roche Sur Yon 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 La Roche Sur Yon 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 La Roche Sur Yon in September 2026.
If you’re planning to visit La Roche Sur Yon in the near future, we highly recommend that you review the 14 day weather forecast for La Roche Sur Yon before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 4° | 8 | 22 | 1 | 94 mm | Bad | La Roche Sur Yon in January |
| February | 10° / 3° | 6 | 21 | 1 | 87 mm | Ok | La Roche Sur Yon in February |
| March | 13° / 5° | 5 | 26 | 0 | 65 mm | Ok | La Roche Sur Yon in March |
| April | 15° / 6° | 5 | 25 | 0 | 63 mm | Good | La Roche Sur Yon in April |
| May | 18° / 9° | 6 | 26 | 0 | 85 mm | Good | La Roche Sur Yon in May |
| June | 22° / 13° | 5 | 25 | 0 | 83 mm | Good | La Roche Sur Yon in June |
| July | 24° / 15° | 4 | 27 | 0 | 53 mm | Perfect | La Roche Sur Yon in July |
| August | 25° / 15° | 3 | 28 | 0 | 46 mm | Perfect | La Roche Sur Yon in August |
| September | 23° / 13° | 3 | 27 | 0 | 53 mm | Perfect | La Roche Sur Yon in September |
| October | 18° / 11° | 5 | 26 | 0 | 79 mm | Good | La Roche Sur Yon in October |
| November | 13° / 8° | 6 | 24 | 0 | 110 mm | Ok | La Roche Sur Yon in November |
| December | 10° / 5° | 8 | 22 | 1 | 118 mm | Bad | La Roche Sur Yon in December |