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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

78°F

26°C

Humidity 93%
Wind Speed Calm
Barometer 29.97 in (1014.4 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 26 Jul 2:53 am CDT
Extended Forecast for

East St. Louis IL

Extreme Heat Warning July 26, 03:47am until July 29, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 26, 03:47am until July 29, 07:00pm

    NOW until 7:00pm Tue

    Extreme Heat Warning

  • Overnight

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly before 3pm. Mostly sunny, with a high near 95. Heat index values as high as 107. Light south wind increasing to 5 to 9 mph in the morning.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 78. South wind 5 to 7 mph. Chance of precipitation is 20%.

    Low: 78 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 96. Heat index values as high as 105. Southwest wind around 6 mph.

    High: 96 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 79. Southwest wind around 5 mph becoming calm in the evening.

    Low: 79 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 80.

    Low: 80 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

Detailed Forecast

Overnight
Partly cloudy, with a low around 77. South wind around 5 mph.
Saturday
A 30 percent chance of showers and thunderstorms, mainly before 3pm. Mostly sunny, with a high near 95. Heat index values as high as 107. Light south wind increasing to 5 to 9 mph in the morning.
Saturday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 78. South wind 5 to 7 mph. Chance of precipitation is 20%.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 96. Heat index values as high as 105. Southwest wind around 6 mph.
Sunday Night
Partly cloudy, with a low around 79. Southwest wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny and hot, with a high near 99.
Monday Night
Mostly clear, with a low around 80.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 78.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 96.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 83.
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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:
3:11 am CDT Jul 26, 2025
Forecast Valid:
3am CDT Jul 26, 2025-6pm CDT Aug 1, 2025
 
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