Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Light Rain

73°F

23°C

Humidity 94%
Wind Speed N 3 mph
Barometer 29.93 in (1013.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 19 Aug 3:54 am CDT
Extended Forecast for

4 Miles N Carrollton IL

  • Overnight

    Overnight: Isolated showers and thunderstorms.  Cloudy, with a low around 69. South wind around 6 mph.  Chance of precipitation is 20%.

    Low: 69 °F

    Isolated
    T-storms

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly after 4pm.  Cloudy, with a high near 79. Light south wind.  Chance of precipitation is 30%.

    High: 79 °F

    Scattered
    Showers then
    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, mainly before 10pm.  Mostly cloudy, with a low around 64. Calm wind.  Chance of precipitation is 30%.

    Low: 64 °F

    Scattered
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 83. Calm wind becoming northeast around 5 mph in the morning.

    High: 83 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 85.

    High: 85 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Overnight
Isolated showers and thunderstorms. Cloudy, with a low around 69. South wind around 6 mph. Chance of precipitation is 20%.
Wednesday
Scattered showers and thunderstorms, mainly after 4pm. Cloudy, with a high near 79. Light south wind. Chance of precipitation is 30%.
Wednesday Night
Scattered showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 83. Calm wind becoming northeast around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 62. Calm wind.
Friday
Sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 64.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Carrollton IL
 39.35°N 90.4°W (Elev. 531 ft)
4:21 am CDT Aug 19, 2026
4am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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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