Click on a day for an hourly weather forecast
The temperatures in Grays in September are usually low and can range between 12°C and 19°C.
You can expect about 3 to 8 days of rain in Grays 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 Grays in September 2025.
If you’re planning to visit Grays in the near future, we highly recommend that you review the 14 day weather forecast for Grays before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 3° | 8 | 19 | 4 | 79 mm | Awful | Grays in January |
| February | 8° / 3° | 8 | 15 | 5 | 72 mm | Awful | Grays in February |
| March | 10° / 4° | 5 | 24 | 2 | 56 mm | Bad | Grays in March |
| April | 13° / 6° | 3 | 26 | 1 | 43 mm | Ok | Grays in April |
| May | 16° / 8° | 5 | 26 | 0 | 64 mm | Good | Grays in May |
| June | 19° / 11° | 4 | 26 | 0 | 73 mm | Good | Grays in June |
| July | 21° / 14° | 5 | 26 | 0 | 66 mm | Good | Grays in July |
| August | 21° / 14° | 4 | 27 | 0 | 73 mm | Good | Grays in August |
| September | 19° / 12° | 3 | 27 | 0 | 46 mm | Good | Grays in September |
| October | 15° / 10° | 6 | 25 | 0 | 85 mm | Good | Grays in October |
| November | 11° / 7° | 7 | 22 | 1 | 81 mm | Bad | Grays in November |
| December | 8° / 4° | 8 | 20 | 3 | 89 mm | Awful | Grays in December |