Click on a day for an hourly weather forecast
The temperatures in Dover in September are comfortable with low of 17°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Dover 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 Dover in September 2025.
If you’re planning to visit Dover in the near future, we highly recommend that you review the 14 day weather forecast for Dover before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -2° | 6 | 19 | 6 | 105 mm | Awful | Dover in January |
| February | 6° / -1° | 7 | 16 | 6 | 136 mm | Awful | Dover in February |
| March | 10° / 3° | 8 | 20 | 3 | 140 mm | Awful | Dover in March |
| April | 16° / 8° | 7 | 23 | 0 | 121 mm | Ok | Dover in April |
| May | 22° / 14° | 8 | 23 | 0 | 153 mm | Ok | Dover in May |
| June | 26° / 18° | 8 | 22 | 0 | 191 mm | Good | Dover in June |
| July | 29° / 21° | 10 | 21 | 0 | 208 mm | Ok | Dover in July |
| August | 28° / 20° | 8 | 23 | 0 | 203 mm | Good | Dover in August |
| September | 25° / 17° | 6 | 24 | 0 | 139 mm | Perfect | Dover in September |
| October | 19° / 12° | 6 | 25 | 0 | 173 mm | Good | Dover in October |
| November | 12° / 6° | 5 | 25 | 0 | 110 mm | Ok | Dover in November |
| December | 8° / 2° | 7 | 21 | 3 | 154 mm | Awful | Dover in December |