Click on a day for an hourly weather forecast
The temperatures in Frederikshavn in September are usually low and can range between 13°C and 16°C.
You can expect about 3 to 8 days of rain in Frederikshavn 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 Frederikshavn in September 2026.
If you’re planning to visit Frederikshavn in the near future, we highly recommend that you review the 14 day weather forecast for Frederikshavn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / 1° | 6 | 15 | 10 | 54 mm | Awful | Frederikshavn in January |
| February | 3° / 1° | 5 | 13 | 10 | 49 mm | Awful | Frederikshavn in February |
| March | 5° / 2° | 4 | 23 | 5 | 38 mm | Awful | Frederikshavn in March |
| April | 9° / 5° | 4 | 25 | 1 | 32 mm | Ok | Frederikshavn in April |
| May | 13° / 9° | 5 | 26 | 0 | 61 mm | Ok | Frederikshavn in May |
| June | 17° / 13° | 5 | 25 | 0 | 67 mm | Good | Frederikshavn in June |
| July | 19° / 15° | 6 | 25 | 0 | 81 mm | Good | Frederikshavn in July |
| August | 19° / 15° | 6 | 25 | 0 | 91 mm | Good | Frederikshavn in August |
| September | 16° / 13° | 5 | 25 | 0 | 55 mm | Good | Frederikshavn in September |
| October | 12° / 9° | 7 | 24 | 0 | 78 mm | Bad | Frederikshavn in October |
| November | 8° / 6° | 7 | 22 | 2 | 61 mm | Awful | Frederikshavn in November |
| December | 5° / 3° | 7 | 18 | 7 | 57 mm | Awful | Frederikshavn in December |