Click on a day for an hourly weather forecast
The temperatures in Clayton in September are comfortable with low of 17°C and and high up to 27°C.
You can expect about 3 to 8 days of rain in Clayton 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 Clayton in September 2025.
If you’re planning to visit Clayton in the near future, we highly recommend that you review the 14 day weather forecast for Clayton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -4° | 5 | 18 | 8 | 77 mm | Awful | Clayton in January |
| February | 5° / -3° | 4 | 17 | 8 | 87 mm | Awful | Clayton in February |
| March | 13° / 4° | 8 | 20 | 3 | 129 mm | Awful | Clayton in March |
| April | 18° / 9° | 8 | 21 | 1 | 174 mm | Ok | Clayton in April |
| May | 24° / 15° | 9 | 22 | 0 | 186 mm | Good | Clayton in May |
| June | 30° / 20° | 9 | 21 | 0 | 185 mm | Ok | Clayton in June |
| July | 31° / 21° | 8 | 23 | 0 | 156 mm | Ok | Clayton in July |
| August | 31° / 20° | 6 | 25 | 0 | 157 mm | Good | Clayton in August |
| September | 27° / 17° | 5 | 25 | 0 | 112 mm | Perfect | Clayton in September |
| October | 20° / 10° | 5 | 26 | 0 | 111 mm | Good | Clayton in October |
| November | 12° / 4° | 4 | 24 | 2 | 90 mm | Bad | Clayton in November |
| December | 7° / 0° | 4 | 22 | 5 | 89 mm | Bad | Clayton in December |