Janesville, WI weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Janesville now
Loading the National Weather Service forecast…
Janesville weather by the hour
Janesville weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Janesville.
This week in Janesville
Sunrise, sunset and moon in Janesville
What is the weather usually like in Janesville?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 83°F average high
- Januarycoldest month · 11°F average low
- 37.4 inprecipitation per year · 951 mm
- 36.6 insnowfall per year · 93 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Janesville: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station AFTON - JANESVILLE WWTP, WI US (USC00470045), adjusted for the elevation of Janesville.
Janesville weather month by month
Sunrise and sunset in Janesville through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:21 AM | 4:49 PM | 9 h 27 min |
| February | 6:51 AM | 5:29 PM | 10 h 38 min |
| March | 7:05 AM | 7:03 PM | 11 h 57 min |
| April | 6:12 AM | 7:39 PM | 13 h 26 min |
| May | 5:31 AM | 8:13 PM | 14 h 41 min |
| June | 5:15 AM | 8:37 PM | 15 h 21 min |
| July | 5:30 AM | 8:33 PM | 15 h 3 min |
| August | 6:01 AM | 7:59 PM | 13 h 57 min |
| September | 6:34 AM | 7:07 PM | 12 h 32 min |
| October | 7:08 AM | 6:15 PM | 11 h 7 min |
| November | 6:46 AM | 4:34 PM | 9 h 48 min |
| December | 7:17 AM | 4:24 PM | 9 h 7 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Janesville?
Janesville has a hot-summer humid continental climate. The warmest month is July, with an average high of 83°F (28°C), and the coldest is January, with average lows of 11°F (-12°C).
It gets about 37.4 inches (951 mm) of precipitation a year. The wettest month is June and the driest is February. Snow is common: about 37 inches fall in an average year.
The best time to visit Janesville is June to September. At 853 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Janesville
Weather in towns near Janesville
Questions about the weather in Janesville
What is the hottest month in Janesville?
July, with an average high of 83°F (28°C).
What is the coldest month in Janesville?
January, with an average low of 11°F (-12°C).
How much does it rain in Janesville?
About 37.4 inches (951 mm) a year; the wettest month is June.
Does it snow in Janesville?
Yes, about 37 inches of snow fall in an average year.
When is the best time to visit Janesville?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Janesville have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Janesville in November?
Highs average 46°F and lows 28°F, with about 2.3 inches of precipitation.
What time is sunrise in Janesville?
Around 6:46 AM in mid-November, and sunset around 4:34 PM. Today’s exact times are shown above.
Where does this Janesville weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Janesville.
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