Click on a day for an hourly weather forecast
The temperatures in Lyon in September are comfortable with low of 11°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Lyon 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 Lyon in September 2025.
If you’re planning to visit Lyon in the near future, we highly recommend that you review the 14 day weather forecast for Lyon before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / -1° | 10 | 13 | 8 | 122 mm | Awful | Lyon in January |
| February | 8° / 0° | 9 | 13 | 6 | 104 mm | Awful | Lyon in February |
| March | 13° / 3° | 8 | 22 | 2 | 99 mm | Awful | Lyon in March |
| April | 17° / 5° | 7 | 23 | 0 | 116 mm | Ok | Lyon in April |
| May | 20° / 8° | 9 | 22 | 0 | 180 mm | Ok | Lyon in May |
| June | 24° / 12° | 9 | 21 | 0 | 156 mm | Good | Lyon in June |
| July | 27° / 14° | 7 | 24 | 0 | 141 mm | Good | Lyon in July |
| August | 27° / 14° | 6 | 25 | 0 | 129 mm | Perfect | Lyon in August |
| September | 23° / 11° | 5 | 25 | 0 | 96 mm | Perfect | Lyon in September |
| October | 17° / 8° | 6 | 25 | 0 | 131 mm | Good | Lyon in October |
| November | 11° / 4° | 9 | 19 | 2 | 150 mm | Awful | Lyon in November |
| December | 7° / 1° | 10 | 16 | 5 | 135 mm | Awful | Lyon in December |