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Monthly
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Current
Hourly
7 Days
14 Days
Monthly
°C
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°Celsius
°Fahrenheit
Monthly Historical Averages
Janesville, WI
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Daily Historical Averages
January 2026
S
M
T
W
T
F
S
1
-9°
2
-6°
3
-6°
4
-5°
5
5°
6
6°
7
3°
8
6°
9
6°
10
1°
11
-1°
12
0°
13
-1°
14
-2°
15
-1°
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Forecast
Thursday, January 1, 2026
Day
-9°
Feels -12
Wind
13 km/h W
Gust
20 km/h
Humidity
66%
P.O.P
40%
Snow
~1 cm
Night
-14°
Feels -20
Wind
11 km/h W
Gust
17 km/h
Humidity
92%
P.O.P
30%
Historical Averages
Jan 1
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
January
Average Temperature
High
-3°
Feels -7
Low
-11°
Feels -17
Average Precipitation
4 Days
Rain amount
0mm
Snow amount
15.1cm