Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

82°F

28°C

Humidity 56%
Wind Speed Calm
Barometer 29.98 in (1014.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 3 Aug 12:54 pm CDT
Extended Forecast for

Hardin IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 85. Calm wind.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog between 4am and 5am.  Otherwise, mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am.  Otherwise, sunny, with a high near 89. Calm wind becoming south around 5 mph.

    High: 89 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Light southeast wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Light south wind.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am.  Low around 68. Chance of precipitation is 80%.

    Low: 68 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm.  Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am.  Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86.

    High: 86 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 85. Calm wind.
Tonight
Patchy fog between 4am and 5am. Otherwise, mostly clear, with a low around 64. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 89. Calm wind becoming south around 5 mph.
Tuesday Night
Mostly clear, with a low around 68. Light southeast wind.
Wednesday
Sunny, with a high near 90. Light south wind.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 68. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 67.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Hardin IL
 39.16°N 90.61°W (Elev. 427 ft)
10:51 am CDT Aug 3, 2026
12pm CDT Aug 3, 2026-6pm CDT Aug 9, 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