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

Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

Current conditions at

Sparta Community-Hunter Field Airport (KSAR)

Lat: 38.15°NLon: 89.7°WElev: 528ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Sparta IL

  • Tonight

    Tonight: Showers, mainly before 8pm. Low around 64. Light and variable wind. Chance of precipitation is 80%.

    Low: 64 °F

    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Light east wind.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 68. Calm wind. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers, mainly before 8pm. Low around 64. Light and variable wind. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 86. Light east wind.
Tuesday Night
Partly cloudy, with a low around 67. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Light and variable wind.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 68. Calm wind. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 72.
Monday
Mostly sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sparta IL
 38.16°N 89.72°W (Elev. 489 ft)
Last Update:
7:21 pm CDT Aug 24, 2026
Forecast Valid:
7pm CDT Aug 24, 2026-6pm CDT Aug 31, 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