Janesville, WI Weather

Like the rest of Wisconsin the climate is humid continental, but its location is in the transition from warm to warm summers in the eastern and northern part of the state. Nowadays the city is the first choice, ie Dfa for Köppen classification where the hot season may not be so comfortable at times, although surges in the outskirts without UHI are in the Dfb zone. The city is at 5a / 5b in the USDA Plant Hardiness Zone.

Average Temperature
Jan
25 °F
-4 °C
Feb
27 °F
-3 °C
Mar
39 °F
4 °C
Apr
53 °F
12 °C
May
61 °F
16 °C
Jun
73 °F
23 °C
Jul
82 °F
28 °C
Aug
75 °F
24 °C
Sep
71 °F
22 °C
Oct
55 °F
13 °C
Nov
37 °F
3 °C
Dec
37 °F
3 °C
Humidity
Jan
64%
Feb
66%
Mar
60%
Apr
67%
May
76%
Jun
79%
Jul
79%
Aug
78%
Sep
86%
Oct
77%
Nov
74%
Dec
70%
Rain
Jan
60mm
Feb
50mm
Mar
31mm
Apr
63mm
May
115mm
Jun
123mm
Jul
244mm
Aug
136mm
Sep
213mm
Oct
111mm
Nov
40mm
Dec
65mm
Clouds
Jan
64%
Feb
72%
Mar
44%
Apr
54%
May
70%
Jun
41%
Jul
32%
Aug
28%
Sep
61%
Oct
56%
Nov
71%
Dec
61%
Sun
Jan
1UVI
Feb
2UVI
Mar
3UVI
Apr
5UVI
May
5UVI
Jun
7UVI
Jul
8UVI
Aug
7UVI
Sep
5UVI
Oct
4UVI
Nov
2UVI
Dec
1UVI