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

Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Current conditions at

Sparta Community-Hunter Field Airport (KSAR)

Lat: 38.15°NLon: 89.7°WElev: 528ft.

Overcast

77°F

25°C

Humidity 82%
Wind Speed NE 8 mph
Barometer 30.05 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 6 Sep 11:15 am CDT
Extended Forecast for

5 Miles WNW Steeleville IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 90. Light north wind becoming northeast 5 to 9 mph in the afternoon.

    High: 90 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 64. Northeast wind 5 to 7 mph.

    Low: 64 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 90. Northeast wind 3 to 6 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Light east wind.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Calm wind becoming south around 6 mph in the afternoon.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 90. Light north wind becoming northeast 5 to 9 mph in the afternoon.
Tonight
Mostly clear, with a low around 64. Northeast wind 5 to 7 mph.
Labor Day
Sunny, with a high near 90. Northeast wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 62. Light east wind.
Tuesday
Sunny, with a high near 93. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 70.
Thursday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 86.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63.
Friday
A 20 percent chance of showers. Sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 63.
Saturday
A 20 percent chance of showers. Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Steeleville IL
 38.05°N 89.75°W (Elev. 502 ft)
Last Update:
11:26 am CDT Sep 6, 2026
Forecast Valid:
11am CDT Sep 6, 2026-6pm CDT Sep 12, 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