The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
Forecasts
Current
Hourly
7 Days
14 Days
Monthly
°C
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Olney, IL
Content continues below
Content continues below
Daily Historical Averages
December 2025
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
19
20
21
22
23
24
25
26
20°
27
17°
28
19°
29
-3°
30
0°
31
5°
Forecast
Friday, December 26, 2025
Day
20°
Feels 20
Wind
26 km/h SW
Gust
39 km/h
Humidity
65%
P.O.P
40%
Rain
<1 mm
Night
6°
Feels 4
Wind
10 km/h N
Gust
15 km/h
Humidity
96%
P.O.P
20%
Historical Averages
Dec 26
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
December
Average Temperature
High
6°
Feels 4
Low
-2°
Feels -5
Average Precipitation
7 Days
Rain amount
36.1mm
Snow amount
3.1cm