Click on a day for an hourly weather forecast
The temperatures in Appleton in September are comfortable with low of 11°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Appleton 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 Appleton in September 2025.
If you’re planning to visit Appleton in the near future, we highly recommend that you review the 14 day weather forecast for Appleton before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -12° | 5 | 9 | 18 | 47 mm | Awful | Appleton in January |
| February | -4° / -11° | 3 | 9 | 16 | 54 mm | Awful | Appleton in February |
| March | 4° / -4° | 6 | 15 | 10 | 74 mm | Awful | Appleton in March |
| April | 10° / 2° | 8 | 17 | 6 | 123 mm | Awful | Appleton in April |
| May | 17° / 8° | 8 | 23 | 0 | 157 mm | Ok | Appleton in May |
| June | 23° / 13° | 8 | 22 | 0 | 161 mm | Good | Appleton in June |
| July | 26° / 16° | 8 | 23 | 0 | 143 mm | Good | Appleton in July |
| August | 25° / 15° | 6 | 25 | 0 | 118 mm | Perfect | Appleton in August |
| September | 21° / 11° | 6 | 24 | 0 | 91 mm | Good | Appleton in September |
| October | 13° / 5° | 7 | 23 | 2 | 106 mm | Awful | Appleton in October |
| November | 6° / -1° | 5 | 19 | 5 | 74 mm | Awful | Appleton in November |
| December | -2° / -7° | 5 | 12 | 14 | 69 mm | Awful | Appleton in December |