Click on a day for an hourly weather forecast
The temperatures in Gatwick in September are usually low and can range between 10°C and 18°C.
You can expect about 3 to 8 days of rain in Gatwick 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 Gatwick in September 2025.
If you’re planning to visit Gatwick in the near future, we highly recommend that you review the 14 day weather forecast for Gatwick before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 2° | 8 | 22 | 1 | 62 mm | Bad | Gatwick in January |
| February | 8° / 2° | 7 | 21 | 1 | 53 mm | Bad | Gatwick in February |
| March | 10° / 3° | 7 | 23 | 1 | 55 mm | Bad | Gatwick in March |
| April | 13° / 4° | 8 | 22 | 0 | 51 mm | Bad | Gatwick in April |
| May | 16° / 7° | 8 | 23 | 0 | 67 mm | Ok | Gatwick in May |
| June | 19° / 10° | 8 | 22 | 0 | 69 mm | Ok | Gatwick in June |
| July | 21° / 12° | 8 | 23 | 0 | 63 mm | Ok | Gatwick in July |
| August | 20° / 12° | 8 | 23 | 0 | 75 mm | Ok | Gatwick in August |
| September | 18° / 10° | 5 | 25 | 0 | 49 mm | Good | Gatwick in September |
| October | 15° / 8° | 8 | 23 | 0 | 85 mm | Ok | Gatwick in October |
| November | 10° / 5° | 9 | 21 | 0 | 83 mm | Bad | Gatwick in November |
| December | 8° / 3° | 9 | 21 | 1 | 73 mm | Bad | Gatwick in December |