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

Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Current conditions at

Salem, Salem-Leckrone Airport (KSLO)

Lat: 38.64°NLon: 88.96°WElev: 574ft.

Partly Cloudy

76°F

24°C

Humidity 87%
Wind Speed NA
Barometer 30.01 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 20 Aug 9:35 am CDT
Extended Forecast for

Smithboro IL

  • Today

    Today: Isolated showers after 1pm. Partly sunny, with a high near 82. Northeast wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 82 °F

    Mostly Cloudy
    then Isolated
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 64. Light northeast wind.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 83. Calm wind becoming northwest 5 to 9 mph in the morning.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
Isolated showers after 1pm. Partly sunny, with a high near 82. Northeast wind 3 to 6 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 64. Light northeast wind.
Friday
Sunny, with a high near 84. Light and variable wind.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 67. Calm wind.
Saturday
Sunny, with a high near 83. Calm wind becoming northwest 5 to 9 mph in the morning.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Smithboro IL
 38.9°N 89.34°W (Elev. 564 ft)
Last Update:
9:36 am CDT Aug 20, 2026
Forecast Valid:
9am CDT Aug 20, 2026-6pm CDT Aug 26, 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