Click on a day for an hourly weather forecast
The temperatures in Brighton in September are usually low and can range between 13°C and 18°C.
You can expect about 3 to 8 days of rain in Brighton 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 Brighton in September 2025.
If you’re planning to visit Brighton in the near future, we highly recommend that you review the 14 day weather forecast for Brighton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 5° | 7 | 21 | 3 | 66 mm | Awful | Brighton in January |
| February | 8° / 5° | 7 | 18 | 3 | 56 mm | Awful | Brighton in February |
| March | 10° / 6° | 4 | 26 | 1 | 42 mm | Ok | Brighton in March |
| April | 12° / 7° | 2 | 27 | 0 | 34 mm | Ok | Brighton in April |
| May | 14° / 9° | 4 | 27 | 0 | 50 mm | Good | Brighton in May |
| June | 17° / 12° | 3 | 27 | 0 | 53 mm | Good | Brighton in June |
| July | 19° / 14° | 3 | 28 | 0 | 52 mm | Good | Brighton in July |
| August | 20° / 15° | 3 | 28 | 0 | 59 mm | Good | Brighton in August |
| September | 18° / 13° | 3 | 27 | 0 | 44 mm | Good | Brighton in September |
| October | 15° / 12° | 5 | 26 | 0 | 72 mm | Good | Brighton in October |
| November | 11° / 8° | 6 | 23 | 0 | 76 mm | Ok | Brighton in November |
| December | 9° / 6° | 6 | 23 | 2 | 75 mm | Bad | Brighton in December |