Click on a day for an hourly weather forecast
The temperatures in Chichester 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 Chichester 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 Chichester in September 2025.
If you’re planning to visit Chichester in the near future, we highly recommend that you review the 14 day weather forecast for Chichester before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 4° | 9 | 19 | 3 | 108 mm | Awful | Chichester in January |
| February | 8° / 4° | 9 | 16 | 3 | 91 mm | Awful | Chichester in February |
| March | 10° / 5° | 6 | 25 | 1 | 69 mm | Ok | Chichester in March |
| April | 12° / 7° | 4 | 26 | 0 | 55 mm | Ok | Chichester in April |
| May | 15° / 9° | 5 | 26 | 0 | 70 mm | Good | Chichester in May |
| June | 17° / 12° | 5 | 25 | 0 | 95 mm | Good | Chichester in June |
| July | 20° / 14° | 5 | 26 | 0 | 78 mm | Good | Chichester in July |
| August | 20° / 15° | 4 | 27 | 0 | 83 mm | Good | Chichester in August |
| September | 18° / 13° | 5 | 25 | 0 | 68 mm | Good | Chichester in September |
| October | 15° / 11° | 8 | 23 | 0 | 125 mm | Ok | Chichester in October |
| November | 11° / 8° | 8 | 22 | 0 | 126 mm | Bad | Chichester in November |
| December | 9° / 6° | 9 | 20 | 2 | 129 mm | Awful | Chichester in December |