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NWS St. Louis Announces Changes To May 16, 2025 Tornado Damage Assessment

After a year-long review of new ground survey data and aerial imagery, NWS St. Louis made several adjustments to the May 16, 2025 tornado damage assessment. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

66°F

19°C

Humidity 73%
Wind Speed E 9 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 May 10:53 am CDT
Extended Forecast for

Mascoutah IL

  • Today

    Today: Scattered showers, mainly after 3pm. Cloudy, with a high near 68. Northeast wind around 7 mph. Chance of precipitation is 40%.

    High: 68 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly before 10pm. Cloudy, with a low around 62. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.

    Low: 62 °F

    Scattered
    Showers then
    Cloudy

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 81. Light west wind.

    High: 81 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Scattered showers after 11pm. Increasing clouds, with a low around 63. Calm wind. Chance of precipitation is 50%.

    Low: 63 °F

    Scattered
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Light and variable wind. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Memorial Day

    Memorial Day: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Scattered showers, mainly after 3pm. Cloudy, with a high near 68. Northeast wind around 7 mph. Chance of precipitation is 40%.
Tonight
Scattered showers, mainly before 10pm. Cloudy, with a low around 62. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 81. Light west wind.
Saturday Night
Scattered showers after 11pm. Increasing clouds, with a low around 63. Calm wind. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Light and variable wind. Chance of precipitation is 60%.
Sunday Night
Mostly cloudy, with a low around 62.
Memorial Day
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 64.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mascoutah IL
 38.52°N 89.81°W (Elev. 423 ft)
Last Update:
11:06 am CDT May 22, 2026
Forecast Valid:
11am CDT May 22, 2026-6pm CDT May 28, 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