National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Rockford, Greater Rockford Airport (KRFD)

Lat: 42.19°NLon: 89.09°WElev: 735ft.

Overcast

78°F

26°C

Humidity 87%
Wind Speed SE 5 mph
Barometer 29.93 in (1012.9 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 3 Sep 1:54 am CDT
Extended Forecast for

Belvidere IL

Heat Advisory September 3, 02:43am until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 3, 02:43am until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Overnight

    Low: 75 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 92 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 10pm. Increasing clouds, with a low around 71. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 90. Heat index values as high as 100. East southeast wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 90 °F

    Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind around 5 mph becoming east after midnight.

    Low: 71 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Southwest wind around 5 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 10pm. Increasing clouds, with a low around 71. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
A 40 percent chance of showers and thunderstorms before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 90. Heat index values as high as 100. East southeast wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind around 5 mph becoming east after midnight.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 61.
Labor Day
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 69.
Wednesday
Partly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Belvidere IL
 42.27°N 88.85°W
Last Update:
1:20 am CDT Sep 3, 2026
Forecast Valid:
2am CDT Sep 3, 2026-6pm CDT Sep 9, 2026
 
Forecast Discussion
 
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Additional Resources

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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