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.

Partly Cloudy

75°F

24°C

Humidity 54%
Wind Speed SE 7 mph
Barometer 29.95 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 23 May 3:45 pm CDT
Extended Forecast for

Janesville WI

  • This Afternoon

    This Afternoon: Isolated showers after 5pm. Mostly sunny, with a high near 77. Southeast wind around 5 mph. Chance of precipitation is 10%.

    High: 77 °F

    Isolated
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 56. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 50%.

    Low: 56 °F

    Scattered
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Northwest wind 5 to 10 mph.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. West wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. South wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 61. Southeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Isolated showers after 5pm. Mostly sunny, with a high near 77. Southeast wind around 5 mph. Chance of precipitation is 10%.
Tonight
Scattered showers and thunderstorms, mainly before 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 56. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 50%.
Sunday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Northwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 56. West wind around 5 mph becoming calm in the evening.
Memorial Day
Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the morning.
Monday Night
Mostly clear, with a low around 59. South wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 61. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 58.
Thursday
Partly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
Last Update:
2:46 pm CDT May 23, 2026
Forecast Valid:
4pm CDT May 23, 2026-6pm CDT May 30, 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