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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair

72°F

22°C

Humidity 88%
Wind Speed S 5 mph
Barometer 29.93 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 31 Aug 1:55 am CDT
Extended Forecast for

5 Miles NNW Shirland IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 3am. Patchy fog. Otherwise, mostly cloudy, with a low around 70. South wind around 10 mph.

    Low: 70 °F

    Chance
    T-storms and
    Patchy Fog

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Partly sunny, with a high near 86. Southwest wind 10 to 15 mph.

    High: 86 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph.

    Low: 71 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms, mainly between noon and 1pm. Mostly sunny, with a high near 88. Heat index values as high as 98. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 88 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. West wind around 5 mph becoming east after midnight.

    Low: 69 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Northeast wind around 5 mph becoming southeast in the afternoon.

    High: 85 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 3am. Patchy fog. Otherwise, mostly cloudy, with a low around 70. South wind around 10 mph.
Monday
A 40 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Partly sunny, with a high near 86. Southwest wind 10 to 15 mph.
Monday Night
Partly cloudy, with a low around 71. Southwest wind 5 to 10 mph.
Tuesday
A 20 percent chance of showers and thunderstorms, mainly between noon and 1pm. Mostly sunny, with a high near 88. Heat index values as high as 98. Light southwest wind increasing to 5 to 10 mph in the morning.
Tuesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 89. Southwest wind 5 to 10 mph.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. West wind around 5 mph becoming east after midnight.
Thursday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Northeast wind around 5 mph becoming southeast in the afternoon.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Shirland IL
 42.54°N 89.22°W (Elev. 850 ft)
Last Update:
1:21 am CDT Aug 31, 2026
Forecast Valid:
2am CDT Aug 31, 2026-6pm CDT Sep 6, 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