Janesville, WI Weather


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The most pleasant months of the year for Janesville are June, August and September. In Janesville, there are 4 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Janesville with an average high temperature of 82.9°, which ranks it as warmer than most places in Wisconsin. January is the snowiest month in Janesville with 10.2 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.

Today's Weather - Janesville, WI

4 AM PST

Widespread Frost then Sunny

32°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
TodayWidespread Frost then Sunny60° / 39°SE 0 to 10 mph
FridayRain Showers60° / 53°SE 15 to 20 mph
SaturdayShowers And Thunderstorms Likely then Chance Showers And Thunderstorms76° / 61°S 20 to 25 mph
SundayShowers And Thunderstorms72° / 58°S 15 to 25 mph
MondayShowers And Thunderstorms Likely66° / 47°SW 20 mph
TuesdayMostly Sunny70° / 54°W 10 to 15 mph
WednesdayChance Showers And Thunderstorms74° / 52°W 10 to 15 mph

Weather Highlights

Summer High: the July high is around 83 degrees
Winter Low: the January low is 11
Rain: averages 36 inches of rain a year
Snow: averages 34 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Janesville area is 9.1 (10=best), which means it is more comfortable than most places in Wisconsin.

9.1 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January28° 11°
February32° 15°
March44° 26°
April58° 37°
May69° 48°
June79° 58°
July83° 62°
August81° 60°
September74° 51°
October61° 39°
November46° 29°
December32° 16°
Hot, Freezing, Rainy, Snowy Days: Janesville
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January03096
February02684
March02492
April09110
May01120
June20110
July40100
August20100
September0090
October07100
November01991
December028105

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

Reviews for Janesville
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Beautiful City - on an Ice Age Trail. I moved here during the Covid thing so it is hard to tell how friendly people are. The government seems closed - encouraged by  More

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My Wife and I have lived here for the last 2 years. Janesville is the pit of Hell. Nothing to do here, especially during the winter time. Closest places are 45 min to  More

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Janesville has pros and cons to living here depending on what is important to you. Janesville has a cheap cost of living and liberal-below average schools. Since you can  More

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