Click on a day for an hourly weather forecast
The temperatures in Saint Etienne in September are quite cold with temperatures between 9°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Saint Etienne 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 Saint Etienne in September 2025.
If you’re planning to visit Saint Etienne in the near future, we highly recommend that you review the 14 day weather forecast for Saint Etienne before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / -1° | 8 | 11 | 11 | 89 mm | Awful | Saint Etienne in January |
| February | 7° / -1° | 8 | 13 | 9 | 80 mm | Awful | Saint Etienne in February |
| March | 11° / 1° | 8 | 19 | 4 | 78 mm | Awful | Saint Etienne in March |
| April | 15° / 4° | 8 | 20 | 2 | 121 mm | Bad | Saint Etienne in April |
| May | 18° / 6° | 9 | 21 | 0 | 165 mm | Ok | Saint Etienne in May |
| June | 22° / 10° | 10 | 20 | 0 | 150 mm | Ok | Saint Etienne in June |
| July | 25° / 12° | 8 | 23 | 0 | 145 mm | Good | Saint Etienne in July |
| August | 25° / 12° | 6 | 25 | 0 | 118 mm | Perfect | Saint Etienne in August |
| September | 21° / 9° | 5 | 25 | 0 | 83 mm | Good | Saint Etienne in September |
| October | 16° / 6° | 5 | 25 | 0 | 104 mm | Good | Saint Etienne in October |
| November | 10° / 3° | 8 | 19 | 4 | 117 mm | Awful | Saint Etienne in November |
| December | 7° / 0° | 7 | 17 | 7 | 81 mm | Awful | Saint Etienne in December |