Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

74°F

23°C

Humidity 98%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 73°F (23°C)
Visibility 1.75 mi
Last update 26 Jul 5:15 am CDT
Extended Forecast for

Mount Olive IL

Extreme Heat Warning July 26, 11:00am until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  • Today

    Today: A slight chance of showers and thunderstorms between 10am and 1pm.  Patchy fog before 9am.  Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 93. Heat index values as high as 111. Calm wind becoming south around 5 mph in the afternoon.  Chance of precipitation is 20%.

    High: 93 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Partly cloudy, with a low around 75. Light and variable wind.

    Low: 75 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 94. Heat index values as high as 109. Light and variable wind becoming southwest 6 to 11 mph in the morning.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Southwest wind 6 to 9 mph becoming west after midnight.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. North wind 6 to 10 mph.

    High: 90 °F

    Sunny

  • Tuesday Night

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

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

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

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 10am and 1pm. Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 93. Heat index values as high as 111. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 75. Light and variable wind.
Monday
Sunny, with a high near 94. Heat index values as high as 109. Light and variable wind becoming southwest 6 to 11 mph in the morning.
Monday Night
Mostly clear, with a low around 75. Southwest wind 6 to 9 mph becoming west after midnight.
Tuesday
Sunny, with a high near 90. North wind 6 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 65.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 65.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Olive IL
 39.07°N 89.73°W (Elev. 669 ft)
4:51 am CDT Jul 26, 2026
5am CDT Jul 26, 2026-6pm CDT Aug 1, 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