Click on a day for an hourly weather forecast
The temperatures in Rhyl in September are usually low and can range between 12°C and 16°C.
You can expect about 3 to 8 days of rain in Rhyl 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 Rhyl in September 2025.
If you’re planning to visit Rhyl in the near future, we highly recommend that you review the 14 day weather forecast for Rhyl before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 4° | 8 | 19 | 4 | 70 mm | Awful | Rhyl in January |
| February | 7° / 4° | 8 | 17 | 4 | 62 mm | Awful | Rhyl in February |
| March | 9° / 5° | 6 | 24 | 2 | 54 mm | Bad | Rhyl in March |
| April | 11° / 6° | 4 | 25 | 1 | 51 mm | Ok | Rhyl in April |
| May | 13° / 8° | 7 | 25 | 0 | 66 mm | Bad | Rhyl in May |
| June | 16° / 11° | 6 | 24 | 0 | 73 mm | Good | Rhyl in June |
| July | 17° / 13° | 6 | 25 | 0 | 79 mm | Good | Rhyl in July |
| August | 17° / 13° | 5 | 26 | 0 | 79 mm | Good | Rhyl in August |
| September | 16° / 12° | 5 | 25 | 0 | 62 mm | Good | Rhyl in September |
| October | 14° / 10° | 7 | 24 | 0 | 79 mm | Ok | Rhyl in October |
| November | 10° / 8° | 8 | 22 | 0 | 88 mm | Bad | Rhyl in November |
| December | 8° / 6° | 8 | 21 | 2 | 77 mm | Awful | Rhyl in December |