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

Hazardous Weather Conditions

Current conditions at

Sterling Rockfalls (KSQI)

Lat: 41.74°NLon: 89.67°WElev: 643ft.

Fair

95°F

35°C

Humidity 47%
Wind Speed SW 13 G 20 mph
Barometer 29.94 in (1012.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 2 Sep 1:56 pm CDT
Extended Forecast for

6 Miles SSE Harmon IL

Heat Advisory until September 3, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until September 3, 09:00pm

    NOW until 9:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 92 °F

    Sunny

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 74. South wind around 5 mph, with gusts as high as 15 mph.

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms between 1am and 3am. Partly cloudy, with a low around 72. South southeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 91. Southeast wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 10 mph.

    High: 91 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Partly cloudy, with a low around 71. Chance of precipitation is 40%.

    Low: 71 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms

  • Saturday Night

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

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 92. Heat index values as high as 101. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
A 10 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 74. South wind around 5 mph, with gusts as high as 15 mph.
Thursday
A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms between 1am and 3am. Partly cloudy, with a low around 72. South southeast wind around 5 mph. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 91. Southeast wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 10 mph.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Partly cloudy, with a low around 71. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 66.
Labor Day
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SSE Harmon IL
 41.64°N 89.54°W
Last Update:
1:21 pm CDT Sep 2, 2026
Forecast Valid:
2pm CDT Sep 2, 2026-6pm CDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation