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

Hazardous Weather Conditions

Current conditions at

Sparta Community-Hunter Field Airport (KSAR)

Lat: 38.15°NLon: 89.7°WElev: 528ft.

Fair

98°F

37°C

Humidity 33%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 16 Aug 3:55 pm CDT
Extended Forecast for

Lenzburg IL

Heat Advisory August 16, 04:15pm until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 16, 04:15pm until August 18, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Tonight

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Isolated showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 107. Light and variable wind. Chance of precipitation is 20%.

    High: 97 °F

    Sunny then
    Isolated
    T-storms

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 30%.

    Low: 75 °F

    Scattered
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 97. Heat index values as high as 109. Light south wind.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Calm wind.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.

    High: 85 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 75. Southeast wind 3 to 5 mph.
Sunday
Isolated showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 107. Light and variable wind. Chance of precipitation is 20%.
Sunday Night
Scattered showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 75. Calm wind. Chance of precipitation is 30%.
Monday
Sunny and hot, with a high near 97. Heat index values as high as 109. Light south wind.
Monday Night
Mostly clear, with a low around 75. Calm wind.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 73.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lenzburg IL
 38.3°N 89.79°W (Elev. 482 ft)
Last Update:
2:36 pm CDT Aug 16, 2025
Forecast Valid:
4pm CDT Aug 16, 2025-6pm CDT Aug 23, 2025
 
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