Monthly Historical AveragesBig Rock, IL
Average Temperature
High
-1°
Feels -5
Low
-9°
Feels -15
Average Precipitation
4 Days
14.2mm
13.4cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, February 21, 2026
Day
1°Feels -4
Wind
21 km/h NW
Gust
32 km/h
Humidity
55%
P.O.P
40%
Night
-8°Feels -17
Wind
27 km/h NW
Gust
41 km/h
Humidity
79%
P.O.P
30%
Historical AveragesFeb 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity