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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

41°F

5°C

Humidity 87%
Wind Speed NW 14 G 22 mph
Barometer 30.00 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 9 Jan 11:45 am CST
Extended Forecast for

Darien WI

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 41. Northwest wind 5 to 15 mph.

    High: 41 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow likely, mainly after 5am. Increasing clouds, with a low around 28. North wind around 5 mph becoming south after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Mostly Cloudy
    then Snow
    Likely

  • Saturday

    Saturday: Snow, mainly before 11am. High near 34. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 34 °F

    Snow then
    Chance Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 19. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 19 °F

    Chance Snow
    and Blustery

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 31. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 31 °F

    Partly Sunny
    and Blustery
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 21. Southwest wind 5 to 10 mph.

    Low: 21 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 39. West wind 10 to 15 mph.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. Southwest wind 10 to 15 mph.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of rain after noon. Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 41. Northwest wind 5 to 15 mph.
Tonight
Snow likely, mainly after 5am. Increasing clouds, with a low around 28. North wind around 5 mph becoming south after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Snow, mainly before 11am. High near 34. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 19. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 31. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 21. Southwest wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 39. West wind 10 to 15 mph.
Monday Night
Mostly cloudy, with a low around 31. Southwest wind 10 to 15 mph.
Tuesday
A 40 percent chance of rain after noon. Mostly cloudy, with a high near 43.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 32.
Wednesday Night
Mostly cloudy, with a low around 16.
Thursday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
12:09 pm CST Jan 9, 2026
Forecast Valid:
12pm CST Jan 9, 2026-6pm CST Jan 15, 2026
 
Forecast Discussion
 
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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