National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

84°F

29°C

Humidity 65%
Wind Speed SW 9 mph
Barometer 29.98 in (1014.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 25 Jun 11:53 am CDT
Extended Forecast for

East St. Louis IL

Flood Watch June 25, 01:00pm until June 26, 07:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 70. Northeast wind around 5 mph becoming calm. Chance of precipitation is 80%.

    Low: 70 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: Showers and thunderstorms, mainly before 4pm. Some of the storms could produce heavy rainfall. High near 84. South wind 6 to 9 mph. Chance of precipitation is 80%.

    High: 84 °F

    Showers then
    Heavy Rain

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Increasing clouds, with a low around 71. Southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 71 °F

    Showers
    Likely

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75.

    Low: 75 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 87. Light and variable wind.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 70. Northeast wind around 5 mph becoming calm. Chance of precipitation is 80%.
Friday
Showers and thunderstorms, mainly before 4pm. Some of the storms could produce heavy rainfall. High near 84. South wind 6 to 9 mph. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Increasing clouds, with a low around 71. Southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 70%.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 98.
Monday Night
Clear, with a low around 78.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 99.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East St. Louis IL
 38.62°N 90.12°W (Elev. 413 ft)
Last Update:
10:26 am CDT Jun 25, 2026
Forecast Valid:
12pm CDT Jun 25, 2026-6pm CDT Jul 1, 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