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

11°F

-12°C

Humidity 67%
Wind Speed SW 5 mph
Barometer 30.19 in (1023.1 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 18 Jan 5:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: Increasing clouds, with a high near 32. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 32 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 11. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 34 mph.

    Low: 11 °F

    Mostly Cloudy
    then Mostly
    Clear and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 22. Northwest wind 8 to 17 mph, with gusts as high as 29 mph.

    High: 22 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. West wind 5 to 7 mph becoming calm.

    Low: 12 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. South wind 6 to 10 mph.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 32. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 11. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 34 mph.
M.L.King Day
Sunny, with a high near 22. Northwest wind 8 to 17 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 12. West wind 5 to 7 mph becoming calm.
Tuesday
Mostly sunny, with a high near 38. South wind 6 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 22.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 27.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 45.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
Last Update:
5:06 am CST Jan 18, 2026
Forecast Valid:
6am CST Jan 18, 2026-6pm CST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation