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.

Fair

46°F

8°C

Humidity 66%
Wind Speed NE 3 mph
Barometer 30.30 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 21 May 12:15 am CDT
Extended Forecast for

4 Miles SE Shirland IL

  • Overnight

    Overnight: Partly cloudy, with a low around 42. Northeast wind around 10 mph.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of sprinkles between 8am and 1pm. Mostly cloudy, with a high near 61. East wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 61 °F

    Chance
    Sprinkles

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46. East northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 63. East wind around 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 1am. Cloudy, with a low around 49. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 42. Northeast wind around 10 mph.
Thursday
A chance of sprinkles between 8am and 1pm. Mostly cloudy, with a high near 61. East wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 46. East northeast wind around 10 mph, with gusts as high as 20 mph.
Friday
A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 63. East wind around 15 mph, with gusts as high as 25 mph.
Friday Night
Showers likely, mainly before 1am. Cloudy, with a low around 49. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Saturday
Partly sunny, with a high near 72.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 52.
Memorial Day
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Partly sunny, with a high near 84.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 59.
Wednesday
A chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Shirland IL
 42.41°N 89.14°W
Last Update:
9:16 pm CDT May 20, 2026
Forecast Valid:
12am CDT May 21, 2026-6pm CDT May 27, 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