National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

70°F

21°C

Humidity 57%
Wind Speed NW 13 G 20 mph
Barometer 29.73 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 24 Apr 3:45 pm CDT
Extended Forecast for

Harvard ILSimilar City Names

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 67. Northwest wind around 15 mph.

    High: 67 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 44. North northwest wind 5 to 10 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 66. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 66 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 42. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 42 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 65. East wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 65 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. Breezy. Chance of precipitation is 70%.

    High: 70 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 50. Breezy.

    Low: 50 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61. Breezy.

    High: 61 °F

    Partly Sunny
    and Breezy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 67. Northwest wind around 15 mph.
Tonight
Partly cloudy, with a low around 44. North northwest wind 5 to 10 mph becoming east northeast after midnight. Winds could gust as high as 15 mph.
Saturday
Sunny, with a high near 66. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Partly cloudy, with a low around 42. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly sunny, with a high near 65. East wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. Breezy. Chance of precipitation is 70%.
Monday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 50. Breezy.
Tuesday
Partly sunny, with a high near 61. Breezy.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harvard ILSimilar City Names
 42.42°N 88.61°W
Last Update:
3:41 pm CDT Apr 24, 2026
Forecast Valid:
3pm CDT Apr 24, 2026-6pm CDT Apr 30, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation