Click on a day for an hourly weather forecast
The temperatures in Grafton in September are comfortable with low of 13°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Grafton 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 Grafton in September 2025.
If you’re planning to visit Grafton in the near future, we highly recommend that you review the 14 day weather forecast for Grafton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -6° | 5 | 16 | 10 | 118 mm | Awful | Grafton in January |
| February | 2° / -6° | 6 | 13 | 10 | 131 mm | Awful | Grafton in February |
| March | 7° / -2° | 7 | 17 | 7 | 139 mm | Awful | Grafton in March |
| April | 14° / 4° | 8 | 21 | 1 | 130 mm | Ok | Grafton in April |
| May | 20° / 9° | 8 | 23 | 0 | 111 mm | Ok | Grafton in May |
| June | 24° / 13° | 8 | 22 | 0 | 129 mm | Good | Grafton in June |
| July | 28° / 17° | 8 | 23 | 0 | 141 mm | Good | Grafton in July |
| August | 28° / 16° | 6 | 25 | 0 | 117 mm | Perfect | Grafton in August |
| September | 24° / 13° | 5 | 25 | 0 | 84 mm | Perfect | Grafton in September |
| October | 17° / 8° | 7 | 24 | 0 | 139 mm | Ok | Grafton in October |
| November | 10° / 2° | 6 | 23 | 1 | 108 mm | Ok | Grafton in November |
| December | 4° / -2° | 7 | 18 | 6 | 139 mm | Awful | Grafton in December |