Monthly Historical AveragesGrinnell, IL
Average Temperature
High
20°
Feels 20
Low
9°
Feels 8
Average Precipitation
10 Days
97.2mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, April 2, 2026
Day
27°Feels 27
Wind
36 km/h S
Gust
54 km/h
Humidity
50%
P.O.P
90%
Rain
2-4 mm
Night
19°Feels 19
Wind
25 km/h S
Gust
38 km/h
Humidity
95%
P.O.P
80%
Rain
~5 mm
Historical AveragesApr 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity