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.

Fair

88°F

31°C

Humidity 68%
Wind Speed S 5 mph
Barometer 30.05 in (1017.2 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 17 Aug 9:53 am CDT
Extended Forecast for

New Baden IL

Heat Advisory August 17, 11:04am until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 17, 11:04am until August 18, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Today

    High: 94 °F

    Scattered
    T-storms

  • Tonight

    Tonight: Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 74. East wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Isolated showers and thunderstorms after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 95. Heat index values as high as 107. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.

    High: 95 °F

    Patchy Fog
    then Isolated
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming west around 5 mph in the afternoon.

    High: 94 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

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

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Today
Scattered showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 94. Heat index values as high as 106. Calm wind. Chance of precipitation is 30%.
Tonight
Isolated showers and thunderstorms before 8pm. Partly cloudy, with a low around 74. East wind 3 to 5 mph. Chance of precipitation is 20%.
Monday
Isolated showers and thunderstorms after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 95. Heat index values as high as 107. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 74. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Wednesday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 67.
Saturday
Sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
New Baden IL
 38.54°N 89.7°W (Elev. 453 ft)
Last Update:
10:56 am CDT Aug 17, 2025
Forecast Valid:
11am CDT Aug 17, 2025-6pm CDT Aug 23, 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