Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

A Few Clouds and Breezy

24°F

-4°C

Humidity 52%
Wind Speed NW 24 G 31 mph
Barometer 30.48 in (1032.6 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 22 Feb 9:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: Sunny, with a high near 30. Blustery, with a northwest wind 20 to 22 mph, with gusts as high as 32 mph.

    High: 30 °F

    Sunny and
    Blustery

  • Tonight

    Tonight: Increasing clouds, with a low around 15. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.

    Low: 15 °F

    Increasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 34. Northwest wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 20. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 20 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54. South wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain.  Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain before noon.  Mostly sunny, with a high near 52.

    High: 52 °F

    Chance Rain
    then Mostly
    Sunny

Detailed Forecast

Today
Sunny, with a high near 30. Blustery, with a northwest wind 20 to 22 mph, with gusts as high as 32 mph.
Tonight
Increasing clouds, with a low around 15. Northwest wind 14 to 17 mph, with gusts as high as 29 mph.
Monday
Sunny, with a high near 34. Northwest wind 8 to 15 mph, with gusts as high as 25 mph.
Monday Night
Increasing clouds, with a low around 20. Calm wind becoming south 5 to 8 mph after midnight.
Tuesday
Mostly cloudy, with a high near 54. South wind 9 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Thursday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 41.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
7:56 am CST Feb 22, 2026
10am CST Feb 22, 2026-6pm CST Feb 28, 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