Appleton Weather Forecast
- 60
- 83
Chance Thunderstorms
- 63
- 83
Chance Thunderstorms
- 61
- 80
Chance Thunderstorms
- 63
- 82
Chance Thunderstorms
- 61
- 80
Chance Rain Showers
- 58
- 76
Chance Rain Showers
Today 19 Sep Knox
Partly sunny. A chance of Showers with a slight chance of Thunderstorms this Morning, then a chance of Thunderstorms with a slight chance of Showers this afternoon. Highs in the lower 80s. Southeast Winds around 5 Mph, becoming southwest around 5 Mph this afternoon. Chance of rain 30 percent.
Tonight 19 Sep Knox
Partly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. Southwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 30 percent.
Appleton Temperature Statistics
September Temperature
Galesburg Municipal Airport (13.7 miles)
Lowest 7 September, 2025
39.6 °FAverage September
65.9 °FHighest 14 September, 2025
95.2 °F
Climate (2020–Present)
Galesburg Municipal Airport (13.7 miles)
Average Low 2020–2025
41.2 °FAverage 2020–2025
51.3 °FAverage High 2020–2025
61.5 °F