Click on a day for an hourly weather forecast
The temperatures in Karlstad in September are usually low and can range between 10°C and 16°C.
You can expect about 3 to 8 days of rain in Karlstad 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 Karlstad in September 2025.
If you’re planning to visit Karlstad in the near future, we highly recommend that you review the 14 day weather forecast for Karlstad before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -3° | 6 | 11 | 14 | 70 mm | Awful | Karlstad in January |
| February | 0° / -3° | 6 | 8 | 15 | 59 mm | Awful | Karlstad in February |
| March | 4° / -1° | 5 | 16 | 9 | 51 mm | Awful | Karlstad in March |
| April | 9° / 3° | 4 | 23 | 3 | 43 mm | Bad | Karlstad in April |
| May | 14° / 7° | 7 | 23 | 1 | 93 mm | Ok | Karlstad in May |
| June | 18° / 11° | 6 | 24 | 0 | 96 mm | Good | Karlstad in June |
| July | 21° / 14° | 7 | 24 | 0 | 125 mm | Ok | Karlstad in July |
| August | 20° / 13° | 7 | 24 | 0 | 132 mm | Ok | Karlstad in August |
| September | 16° / 10° | 6 | 24 | 0 | 90 mm | Good | Karlstad in September |
| October | 10° / 6° | 8 | 22 | 1 | 104 mm | Bad | Karlstad in October |
| November | 5° / 3° | 8 | 17 | 4 | 84 mm | Awful | Karlstad in November |
| December | 1° / -1° | 8 | 11 | 12 | 70 mm | Awful | Karlstad in December |