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Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Light Rain

61°F

16°C

Humidity 94%
Wind Speed NW 13 G 21 mph
Barometer 29.79 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 May 1:55 am CDT
Extended Forecast for

South Beloit IL

Severe T-storm Watch until May 16, 05:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until May 16, 05:00am

    NOW until 5:00am Sat

    Severe T-storm Watch

  • Overnight

    Low: 60 °F

    Severe
    Thunderstorms

  • Saturday

    Saturday: A 10 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 83. West southwest wind 5 to 10 mph.

    High: 83 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 58. North northwest wind around 5 mph becoming east southeast after midnight.

    Low: 58 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 84. Breezy, with an east southeast wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 84 °F

    Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 30 mph.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 90%.

    High: 83 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. Breezy.

    High: 80 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Some of the storms could be severe. Low around 60. Southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 10 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 83. West southwest wind 5 to 10 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 58. North northwest wind around 5 mph becoming east southeast after midnight.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 84. Breezy, with an east southeast wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. South wind around 15 mph, with gusts as high as 30 mph.
Monday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 90%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. Breezy.
Tuesday Night
Mostly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Beloit IL
 42.5°N 89.05°W
Last Update:
1:21 am CDT May 16, 2026
Forecast Valid:
2am CDT May 16, 2026-6pm CDT May 22, 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