Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

55°F

13°C

Humidity 96%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 54°F (12°C)
Visibility 5.00 mi
Last update 24 Aug 6:15 am CDT
Extended Forecast for

3 Miles NNE Granite City IL

  • Today

    Today: Widespread dense fog, mainly before 7am.  Otherwise, sunny, with a high near 84. Calm wind becoming east around 6 mph in the afternoon.

    High: 84 °F

    Dense Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. East wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Southeast wind 5 to 7 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68. East wind around 6 mph becoming calm  in the evening.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 4pm.  Mostly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the morning.  Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 68.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Widespread dense fog, mainly before 7am. Otherwise, sunny, with a high near 84. Calm wind becoming east around 6 mph in the afternoon.
Tonight
Mostly clear, with a low around 63. East wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 86. Southeast wind 5 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 68. East wind around 6 mph becoming calm in the evening.
Wednesday
A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the morning. Chance of precipitation is 20%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 88.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 67.
Saturday
Partly sunny, with a high near 91.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 73.
Sunday
Partly sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Granite City IL
 38.75°N 90.11°W (Elev. 417 ft)
5:41 am CDT Aug 24, 2026
6am CDT Aug 24, 2026-6pm CDT Aug 30, 2026
 
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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