Janesville Weather Year-Round — Best Time to Visit
Janesville, United States has cool weather year-round. The best time to visit is July (score: 85/100). Annual average high: 13.7°C, total rainfall: 871mm.
When is the best time to visit Janesville?
85
July is the best month to visit Janesville with a travel score of 85/100 (Excellent).
Expect highs of 27.5°C, 10 rain days, and 12.2 hours of daily sunshine.
View July weather details →Travel Score by Month
40
Jan
46
Feb
56
Mar
64
Apr
75
May
82
Jun
85
Jul
84
Aug
83
Sep
68
Oct
56
Nov
43
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Janesville each month?
13.7°C
Avg High
4.8°C
Avg Low
871mm
Annual Rain
How much rain does Janesville get?
Janesville receives 871mm of rain annually. The wettest month is typically June with 104mm, while February is the driest.
What is the weather like each month in Janesville?
January
40
-2°C
Low: -10°C
8 rain days
Mixed
February
46
0°C
Low: -9°C
7 rain days
Mixed
March
56
7°C
Low: -3°C
9 rain days
Mixed
April
64
14°C
Low: 4°C
11 rain days
Good
May
75
20°C
Low: 10°C
11 rain days
Good
June
82
26°C
Low: 16°C
11 rain days
Excellent
July
Best time to visit85
28°C
Low: 18°C
10 rain days
Excellent
August
84
27°C
Low: 18°C
10 rain days
Excellent
September
83
23°C
Low: 14°C
8 rain days
Excellent
October
68
15°C
Low: 7°C
9 rain days
Good
November
56
8°C
Low: 0°C
7 rain days
Mixed
December
43
1°C
Low: -6°C
8 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31