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Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

70°F

21°C

Humidity 43%
Wind Speed NE 9 G 22 mph
Barometer 30.13 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 22 Jul 12:45 pm CDT
Extended Forecast for

South Beloit IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 74. North wind 5 to 10 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 74. North wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 52. North wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 78. Calm wind becoming southwest around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 79. Light and variable wind becoming south 5 to 10 mph in the morning.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
A chance of showers after 1am. Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 90.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 87.
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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 pm CDT Jul 22, 2026
Forecast Valid:
1pm CDT Jul 22, 2026-6pm CDT Jul 28, 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