Monthly Historical AveragesDecatur, IL
Average Temperature
High
11°
Feels 10
Low
1°
Feels -2
Average Precipitation
8 Days
41.5mm
1.3cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, March 7, 2026
Day
18°Feels 17
Wind
32 km/h SW
Gust
49 km/h
Humidity
60%
P.O.P
60%
Rain
1-3 mm
Night
2°Feels -2
Wind
23 km/h W
Gust
35 km/h
Humidity
91%
P.O.P
20%
Historical AveragesMar 7
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity