Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

10°F

-12°C

Humidity 61%
Wind Speed W 12 mph
Barometer 30.16 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill-5°F (-21°C)
Last update 28 Jan 11:45 am CST
Extended Forecast for

Janesville WI

  • This Afternoon

    This Afternoon: Sunny, with a high near 15. Wind chill values between -5 and zero. Northwest wind 10 to 15 mph.

    High: 15 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around -5. Wind chill values between -10 and -15. Northwest wind 5 to 10 mph.

    Low: -5 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 12. Wind chill values between -10 and zero. Northwest wind around 5 mph.

    High: 12 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -4. Wind chill values between -10 and -15. Calm wind becoming north around 5 mph after midnight.

    Low: -4 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 12. North wind 5 to 10 mph.

    High: 12 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 2. Northwest wind around 5 mph.

    Low: 2 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 19. North wind around 5 mph.

    High: 19 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 3. Northwest wind around 5 mph becoming calm.

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of snow, mainly after noon.  Mostly sunny, with a high near 24.

    High: 24 °F

    Chance Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 15. Wind chill values between -5 and zero. Northwest wind 10 to 15 mph.
Tonight
Mostly clear, with a low around -5. Wind chill values between -10 and -15. Northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 12. Wind chill values between -10 and zero. Northwest wind around 5 mph.
Thursday Night
Partly cloudy, with a low around -4. Wind chill values between -10 and -15. Calm wind becoming north around 5 mph after midnight.
Friday
Mostly sunny, with a high near 12. North wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 2. Northwest wind around 5 mph.
Saturday
Mostly sunny, with a high near 19. North wind around 5 mph.
Saturday Night
Mostly clear, with a low around 3. Northwest wind around 5 mph becoming calm.
Sunday
A 30 percent chance of snow, mainly after noon. Mostly sunny, with a high near 24.
Sunday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 13.
Monday
Mostly cloudy, with a high near 26.
Monday Night
Mostly cloudy, with a low around 10.
Tuesday
A 20 percent chance of snow. Mostly cloudy, with a high near 27.
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ABOUT THIS FORECAST

 
Point Forecast:
Janesville WI
 42.67°N 89.04°W (Elev. 774 ft)
11:09 am CST Jan 28, 2026
12pm CST Jan 28, 2026-6pm CST Feb 3, 2026
 
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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