Click on a day for an hourly weather forecast
The temperatures in Wales in September are usually low and can range between 12°C and 18°C.
You can expect about 3 to 8 days of rain in Wales 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 Wales in September 2024.
If you’re planning to visit Wales in the near future, we highly recommend that you review the 14 day weather forecast for Wales before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 4° | 8 | 20 | 3 | 86 mm | Awful | Wales in January |
| February | 8° / 4° | 8 | 18 | 3 | 77 mm | Awful | Wales in February |
| March | 10° / 4° | 6 | 24 | 1 | 62 mm | Ok | Wales in March |
| April | 12° / 6° | 5 | 25 | 0 | 48 mm | Ok | Wales in April |
| May | 15° / 8° | 5 | 26 | 0 | 71 mm | Good | Wales in May |
| June | 18° / 11° | 5 | 25 | 0 | 72 mm | Good | Wales in June |
| July | 20° / 13° | 5 | 26 | 0 | 77 mm | Good | Wales in July |
| August | 19° / 13° | 6 | 25 | 0 | 85 mm | Good | Wales in August |
| September | 18° / 12° | 4 | 26 | 0 | 56 mm | Good | Wales in September |
| October | 14° / 10° | 7 | 24 | 0 | 99 mm | Ok | Wales in October |
| November | 11° / 7° | 8 | 22 | 0 | 101 mm | Bad | Wales in November |
| December | 9° / 5° | 9 | 21 | 2 | 105 mm | Awful | Wales in December |