Click on a day for an hourly weather forecast
The temperatures in Frankfurt in September are comfortable with low of 12°C and and high up to 22°C.
The wather in Frankfurt in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Frankfurt in September 2025.
If you’re planning to visit Frankfurt in the near future, we highly recommend that you review the 14 day weather forecast for Frankfurt before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / 0° | 7 | 16 | 8 | 48 mm | Awful | Frankfurt in January |
| February | 6° / 0° | 5 | 17 | 6 | 40 mm | Awful | Frankfurt in February |
| March | 11° / 3° | 5 | 24 | 2 | 35 mm | Bad | Frankfurt in March |
| April | 16° / 6° | 3 | 26 | 1 | 35 mm | Good | Frankfurt in April |
| May | 20° / 9° | 5 | 26 | 0 | 74 mm | Good | Frankfurt in May |
| June | 24° / 13° | 4 | 26 | 0 | 70 mm | Perfect | Frankfurt in June |
| July | 26° / 15° | 5 | 26 | 0 | 82 mm | Perfect | Frankfurt in July |
| August | 26° / 15° | 4 | 27 | 0 | 69 mm | Perfect | Frankfurt in August |
| September | 22° / 12° | 2 | 28 | 0 | 42 mm | Good | Frankfurt in September |
| October | 15° / 8° | 5 | 26 | 0 | 53 mm | Good | Frankfurt in October |
| November | 9° / 4° | 5 | 23 | 2 | 50 mm | Bad | Frankfurt in November |
| December | 5° / 1° | 8 | 17 | 7 | 61 mm | Awful | Frankfurt in December |