Forecast for Janesville, WI | Forecast Periods: 14
Monday
Mar 16
2026
Janesville, WI
Updated: 3:33 PM CDT
23°F
Chance Light Snow And Patchy Blowing Snow
20 mph NW
Precipitation: 37%
A chance of snow and patchy blowing snow before 4pm, then patchy blowing snow and a slight chance of snow. Cloudy, with a high near 23. Northwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.
Hourly Forecast
Extended Forecast
Tonight
Mon, Mar 16
2°F
Patchy Blowing Snow then Mostly Cloudy
10 mph NW
Precipitation: 18%
Patchy blowing snow and a slight chance of snow before midnight. Mostly cloudy, with a low around 2. Wind chill values as low as -9. Northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%. New snow accumulation of less than half an inch possible.
Tuesday
Tue, Mar 17
21°F
Mostly Sunny
5 mph W
Precipitation: 0%
Mostly sunny, with a high near 21. Wind chill values as low as -12. West wind 5 to 10 mph.
Tuesday Night
Tue, Mar 17
17°F
Light Snow
5 mph S
Precipitation: 87%
Snow after 7pm. Cloudy. Low around 17, with temperatures rising to around 23 overnight. South wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of around one inch possible.
Wednesday
Wed, Mar 18
40°F
Chance Light Snow then Partly Sunny
5 mph SW
Precipitation: 45%
A chance of snow before 7am. Partly sunny, with a high near 40. Southwest wind 5 to 10 mph. Chance of precipitation is 50%. New snow accumulation of less than half an inch possible.
Wednesday Night
Wed, Mar 18
30°F
Mostly Cloudy then Slight Chance Light Rain
0 mph SW
Precipitation: 17%
A slight chance of rain after 1am. Mostly cloudy, with a low around 30. Southwest wind 0 to 5 mph. Chance of precipitation is 20%.
Thursday
Thu, Mar 19
44°F
Slight Chance Light Rain then Mostly Sunny
0 mph W
Precipitation: 17%
A slight chance of rain before 7am. Mostly sunny, with a high near 44. West wind 0 to 5 mph. Chance of precipitation is 20%.
Thursday Night
Thu, Mar 19
32°F
Mostly Cloudy
5 mph SE
Precipitation: 1%
Mostly cloudy, with a low around 32. Southeast wind around 5 mph.
Friday
Fri, Mar 20
52°F
Partly Sunny
5 mph SW
Precipitation: 2%
Partly sunny, with a high near 52.
Friday Night
Fri, Mar 20
35°F
Mostly Cloudy
5 mph SW
Precipitation: 5%
Mostly cloudy, with a low around 35.
Saturday
Sat, Mar 21
58°F
Mostly Sunny
10 mph W
Precipitation: 4%
Mostly sunny, with a high near 58.
Saturday Night
Sat, Mar 21
35°F
Mostly Cloudy
10 mph NW
Precipitation: 11%
Mostly cloudy, with a low around 35.
Sunday
Sun, Mar 22
51°F
Partly Sunny
10 mph NW
Precipitation: 11%
Partly sunny, with a high near 51.
Sunday Night
Sun, Mar 22
26°F
Mostly Cloudy
10 mph N
Precipitation: 3%
Mostly cloudy, with a low around 26.