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

Wet and Cool in the East this Memorial Day Weekend; Well Above Normal Temperatures in the Northern Plains

A wet Memorial Day weekend is in store for the East, with widespread rainfall of 1 to more than 2 inches expected from the Gulf Coast to southern New England. Well above normal temperatures are forecast to build across the northern Plains. Another round of heavy to excessive rainfall is expected to impact the western Gulf Coast this weekend with Flood Watches in effect. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

57°F

14°C

Humidity 51%
Wind Speed E 14 mph
Barometer 30.13 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 22 May 10:45 am CDT
Extended Forecast for

Janesville WI

  • Today

    Today: Mostly cloudy, with a high near 67. East wind around 15 mph.

    High: 67 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of sprinkles between 3am and 4am. Mostly cloudy, with a low around 53. East wind 5 to 10 mph.

    Low: 53 °F

    Chance
    Sprinkles

  • Saturday

    Saturday: A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 75. East wind around 5 mph.

    High: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 50%.

    Low: 55 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 79 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.

    High: 86 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South wind around 5 mph becoming calm.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 67. East wind around 15 mph.
Tonight
A chance of sprinkles between 3am and 4am. Mostly cloudy, with a low around 53. East wind 5 to 10 mph.
Saturday
A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 75. East wind around 5 mph.
Saturday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 50%.
Sunday
A 30 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 53. Calm wind.
Memorial Day
Sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 58. South wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 60.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
10:27 am CDT May 22, 2026
Forecast Valid:
11am CDT May 22, 2026-6pm CDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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