Click on a day for an hourly weather forecast
The temperatures in Bern in September are quite cold with temperatures between 6°C and 20°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Bern 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 Bern in September 2025.
If you’re planning to visit Bern in the near future, we highly recommend that you review the 14 day weather forecast for Bern before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -6° | 10 | 9 | 13 | 165 mm | Awful | Bern in January |
| February | 5° / -6° | 9 | 9 | 12 | 130 mm | Awful | Bern in February |
| March | 9° / -2° | 8 | 15 | 8 | 129 mm | Awful | Bern in March |
| April | 14° / 1° | 8 | 19 | 2 | 126 mm | Bad | Bern in April |
| May | 17° / 3° | 13 | 18 | 0 | 235 mm | Ok | Bern in May |
| June | 22° / 8° | 13 | 17 | 0 | 238 mm | Ok | Bern in June |
| July | 24° / 9° | 12 | 19 | 0 | 226 mm | Good | Bern in July |
| August | 24° / 9° | 10 | 21 | 0 | 195 mm | Good | Bern in August |
| September | 20° / 6° | 6 | 24 | 0 | 132 mm | Good | Bern in September |
| October | 15° / 2° | 6 | 24 | 1 | 133 mm | Good | Bern in October |
| November | 10° / -1° | 8 | 17 | 6 | 152 mm | Awful | Bern in November |
| December | 5° / -4° | 10 | 11 | 10 | 191 mm | Awful | Bern in December |