Click on a day for an hourly weather forecast
The temperatures in Tonsberg in September are usually low and can range between 11°C and 16°C.
You can expect about 3 to 8 days of rain in Tonsberg 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 Tonsberg in September 2024.
If you’re planning to visit Tonsberg in the near future, we highly recommend that you review the 14 day weather forecast for Tonsberg before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -3° | 5 | 14 | 12 | 85 mm | Awful | Tonsberg in January |
| February | 0° / -3° | 5 | 11 | 12 | 73 mm | Awful | Tonsberg in February |
| March | 4° / 0° | 5 | 18 | 8 | 64 mm | Awful | Tonsberg in March |
| April | 9° / 4° | 4 | 24 | 2 | 46 mm | Bad | Tonsberg in April |
| May | 13° / 8° | 6 | 25 | 0 | 98 mm | Ok | Tonsberg in May |
| June | 17° / 12° | 5 | 25 | 0 | 91 mm | Good | Tonsberg in June |
| July | 19° / 14° | 7 | 24 | 0 | 127 mm | Ok | Tonsberg in July |
| August | 19° / 14° | 7 | 24 | 0 | 132 mm | Ok | Tonsberg in August |
| September | 16° / 11° | 6 | 24 | 0 | 116 mm | Good | Tonsberg in September |
| October | 10° / 7° | 9 | 22 | 0 | 125 mm | Bad | Tonsberg in October |
| November | 6° / 3° | 8 | 19 | 4 | 118 mm | Awful | Tonsberg in November |
| December | 2° / -1° | 8 | 14 | 9 | 98 mm | Awful | Tonsberg in December |