Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Mostly Cloudy

72°F

22°C

Humidity 73%
Wind Speed NW 5 mph
Barometer 30.04 in (1016.8 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 22 Aug 11:54 pm CDT
Extended Forecast for

4 Miles W Old Monroe MO

  • Overnight

    Overnight: Mostly clear, with a low around 62. Light northwest wind.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 81. Calm wind becoming northwest 5 to 8 mph in the morning.

    High: 81 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Cloudy, then gradual clearing toward daybreak, with a low around 60. Light and variable wind.

    Low: 60 °F

    Clearing Late

  • Monday

    Monday: Mostly sunny, with a high near 81. Calm wind becoming south around 5 mph.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am.  Partly cloudy, with a low around 64. Calm wind.  Chance of precipitation is 20%.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 62. Light northwest wind.
Sunday
Increasing clouds, with a high near 81. Calm wind becoming northwest 5 to 8 mph in the morning.
Sunday Night
Cloudy, then gradual clearing toward daybreak, with a low around 60. Light and variable wind.
Monday
Mostly sunny, with a high near 81. Calm wind becoming south around 5 mph.
Monday Night
A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 66.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Old Monroe MO
 38.94°N 90.82°W (Elev. 525 ft)
11:16 pm CDT Aug 22, 2026
12am CDT Aug 23, 2026-6pm CDT Aug 29, 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