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Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Decatur, IL
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October
Average Temperature
High
19°
Feels 18
Low
7°
Feels 6
Average Precipitation
9 Days
Rain amount
55.7mm
Snow amount
0.2cm
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Daily Historical Averages
October 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
17°
19
20°
20
21°
21
22°
22
23°
23
23°
24
23°
25
25°
26
25°
27
24°
28
25°
29
25°
30
24°
31
24°
Forecast
Sunday, October 18, 2026
Day
17°
Feels 17
Wind
20 km/h S
Gust
30 km/h
Humidity
38%
P.O.P
0%
Night
3°
Feels 2
Wind
13 km/h S
Gust
19 km/h
Humidity
96%
P.O.P
0%
Historical Averages
Oct 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.