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.

Overcast

23°F

-5°C

Humidity 86%
Wind Speed S 7 mph
Barometer 30.01 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 18 Mar 3:15 am CDT
Extended Forecast for

Darien WI

  • Overnight

    Overnight: Snow. Steady temperature around 22. South wind around 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.

    Low: 22 °F

    Snow

  • Wednesday

    Wednesday: A chance of snow and freezing rain before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 39. South wind 10 to 15 mph. Chance of precipitation is 30%.

    High: 39 °F

    Chance Wintry
    Mix then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 32. Southwest wind around 5 mph.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: A 20 percent chance of rain before 10am. Partly sunny, with a high near 45. South wind around 5 mph becoming north in the afternoon.

    High: 45 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 34. Northeast wind around 5 mph becoming calm in the evening.

    Low: 34 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 58. Southwest wind 5 to 10 mph.

    High: 58 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. Northwest wind around 5 mph becoming northeast after midnight.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 64. Southwest wind 5 to 10 mph.

    High: 64 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of rain. Increasing clouds, with a low around 39.

    Low: 39 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Snow. Steady temperature around 22. South wind around 10 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.
Wednesday
A chance of snow and freezing rain before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 39. South wind 10 to 15 mph. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 32. Southwest wind around 5 mph.
Thursday
A 20 percent chance of rain before 10am. Partly sunny, with a high near 45. South wind around 5 mph becoming north in the afternoon.
Thursday Night
Mostly cloudy, with a low around 34. Northeast wind around 5 mph becoming calm in the evening.
Friday
Mostly cloudy, with a high near 58. Southwest wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 38. Northwest wind around 5 mph becoming northeast after midnight.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 64. Southwest wind 5 to 10 mph.
Saturday Night
A 20 percent chance of rain. Increasing clouds, with a low around 39.
Sunday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 56.
Sunday Night
Partly cloudy, with a low around 25.
Monday
Partly sunny, with a high near 42.
Monday Night
Partly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 50.
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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:
2:32 am CDT Mar 18, 2026
Forecast Valid:
3am CDT Mar 18, 2026-6pm CDT Mar 24, 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