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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

67°F

19°C

Humidity 45%
Wind Speed N 12 mph
Barometer 29.98 in (1014.9 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 13 May 3:53 am CDT
Extended Forecast for

3 Miles SW Mascoutah IL

  • Overnight

    Overnight: Mostly cloudy early, then becoming clear, with a low around 58. Northwest wind around 8 mph.

    Low: 58 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74. Northwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 46. North wind 5 to 8 mph becoming calm in the evening.

    Low: 46 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 74. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 56. Southeast wind 6 to 9 mph. Chance of precipitation is 40%.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.

    Low: 65 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy early, then becoming clear, with a low around 58. Northwest wind around 8 mph.
Wednesday
Sunny, with a high near 74. Northwest wind 7 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
Clear, with a low around 46. North wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 74. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 56. Southeast wind 6 to 9 mph. Chance of precipitation is 40%.
Friday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 70.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. Chance of precipitation is 70%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Mascoutah IL
 38.48°N 89.84°W (Elev. 400 ft)
Last Update:
2:01 am CDT May 13, 2026
Forecast Valid:
3am CDT May 13, 2026-6pm CDT May 19, 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