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

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fog/Mist

37°F

3°C

Humidity 93%
Wind Speed S 7 mph
Barometer 30.01 in
Dewpoint 36°F (2°C)
Visibility 2.00 mi
Wind Chill32°F (0°C)
Last update 27 Dec 8:45 am CST
Extended Forecast for

Darien WI

  • Today

    Today: Patchy fog before noon, then patchy fog after 5pm. Otherwise, cloudy, with a high near 44. Southeast wind 5 to 10 mph.

    High: 44 °F

    Patchy Fog

  • Tonight

    Tonight: A 50 percent chance of rain after 2am. Patchy fog. Otherwise, cloudy, with a low around 41. Southeast wind 5 to 10 mph.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Sunday

    Sunday: Rain. High near 53. South wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 53 °F

    Rain

  • Sunday Night

    Sunday Night: Rain likely, possibly mixed with snow, becoming all snow after 9pm. Cloudy, with a low around 15. Wind chill values between -5 and 5. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 15 °F

    Windy.
    Rain/Snow
    Likely then
    Snow Likely

  • Monday

    Monday: A 50 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 22. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph.

    High: 22 °F

    Windy. Chance
    Snow then
    Slight Chance
    Snow

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 8 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 25. West wind 10 to 15 mph.

    High: 25 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. West wind 10 to 15 mph.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 26.

    High: 26 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Today
Patchy fog before noon, then patchy fog after 5pm. Otherwise, cloudy, with a high near 44. Southeast wind 5 to 10 mph.
Tonight
A 50 percent chance of rain after 2am. Patchy fog. Otherwise, cloudy, with a low around 41. Southeast wind 5 to 10 mph.
Sunday
Rain. High near 53. South wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday Night
Rain likely, possibly mixed with snow, becoming all snow after 9pm. Cloudy, with a low around 15. Wind chill values between -5 and 5. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday
A 50 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 22. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 45 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday
Increasing clouds, with a high near 25. West wind 10 to 15 mph.
Tuesday Night
Mostly cloudy, with a low around 17. West wind 10 to 15 mph.
Wednesday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 26.
Wednesday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7.
New Year's Day
Sunny, with a high near 13.
Thursday Night
Mostly clear, with a low around -1.
Friday
Sunny, with a high near 17.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Darien WI
 42.59°N 88.72°W (Elev. 945 ft)
Last Update:
9:14 am CST Dec 27, 2025
Forecast Valid:
9am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation