Tri-County Airport Weather Forecast
- 59
- 90
Becoming Sunny
- 63
- 92
Partly Sunny
- 60
- 83
Chance Thunderstorms
- 64
- 85
Chance Rain Showers
- 63
- 84
Chance Rain Showers
- 60
- 83
Chance Rain Showers
Today 17 Sep Knox
Sunny. Highs in the upper 80s. East Winds around 5 Mph.
Tonight 17 Sep Knox
Mostly clear. Lows in the upper 50s. East Winds around 5 Mph.
Tri-County Airport Temperature Statistics
September Temperature
Peoria - General Downing-Peoria International Airport (21.1 miles)
Lowest 7 September, 2025
45 °FAverage September
66.8 °FHighest 13 September, 2025
96.1 °F
Climate (2020–Present)
Peoria - General Downing-Peoria International Airport (21.1 miles)
Average Low 2020–2025
45.1 °FAverage 2020–2025
54.5 °FAverage High 2020–2025
64.1 °F