Click on a day for an hourly weather forecast
The temperatures in Flensburg in August are comfortable with low of 14°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Flensburg during the month of August. 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 Flensburg in August 2026.
If you’re planning to visit Flensburg in the near future, we highly recommend that you review the 14 day weather forecast for Flensburg before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / 0° | 10 | 12 | 9 | 95 mm | Awful | Flensburg in January |
| February | 4° / 0° | 8 | 10 | 11 | 74 mm | Awful | Flensburg in February |
| March | 7° / 2° | 7 | 19 | 5 | 63 mm | Awful | Flensburg in March |
| April | 12° / 4° | 5 | 23 | 2 | 44 mm | Bad | Flensburg in April |
| May | 15° / 7° | 7 | 24 | 0 | 78 mm | Ok | Flensburg in May |
| June | 19° / 11° | 5 | 25 | 0 | 77 mm | Good | Flensburg in June |
| July | 21° / 13° | 7 | 24 | 0 | 100 mm | Ok | Flensburg in July |
| August | 21° / 14° | 6 | 25 | 0 | 114 mm | Good | Flensburg in August |
| September | 18° / 12° | 6 | 24 | 0 | 105 mm | Good | Flensburg in September |
| October | 13° / 8° | 8 | 23 | 0 | 116 mm | Bad | Flensburg in October |
| November | 8° / 5° | 9 | 19 | 2 | 100 mm | Awful | Flensburg in November |
| December | 5° / 2° | 10 | 15 | 6 | 105 mm | Awful | Flensburg in December |