Monthly Historical AveragesMonticello, IL
Average Temperature
High
4°
Feels 1
Low
-4°
Feels -9
Average Precipitation
9 Days
39.9mm
5.7cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastWednesday, December 24, 2025
Day
11°Feels 10
Wind
17 km/h E
Gust
26 km/h
Humidity
67%
P.O.P
30%
Night
8°Feels 6
Wind
14 km/h SW
Gust
22 km/h
Humidity
100%
P.O.P
60%
Rain
1-3 mm
Historical AveragesDec 24
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity