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

49°F

9°C

Humidity 35%
Wind Speed W 13 mph
Barometer 30.05 in (1017.8 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 21 Jan 12:53 pm CST
Extended Forecast for

Granite City IL

Winter Storm Watch January 24, 12:00am until January 25, 12:00pm
Click here for hazard details and duration
Winter Storm Watch

  • This Afternoon

    This Afternoon: Sunny, with a high near 47. West wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 47 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Southwest wind 5 to 11 mph becoming northwest in the evening. Winds could gust as high as 23 mph.

    Low: 23 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 39. Calm wind becoming west around 6 mph.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 10. Light and variable wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 23 mph.

    Low: 10 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 16. North wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 16 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow after midnight. Cloudy, with a low around 4.

    Low: 4 °F

    Cloudy then
    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 15. Chance of precipitation is 60%.

    High: 15 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Snow. Low around 9. Chance of precipitation is 80%.

    Low: 9 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 20.

    High: 20 °F

    Chance Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 47. West wind 9 to 14 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 23. Southwest wind 5 to 11 mph becoming northwest in the evening. Winds could gust as high as 23 mph.
Thursday
Partly sunny, with a high near 39. Calm wind becoming west around 6 mph.
Thursday Night
Mostly cloudy, with a low around 10. Light and variable wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 23 mph.
Friday
Mostly cloudy and cold, with a high near 16. North wind 11 to 15 mph, with gusts as high as 24 mph.
Friday Night
A 30 percent chance of snow after midnight. Cloudy, with a low around 4.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 15. Chance of precipitation is 60%.
Saturday Night
Snow. Low around 9. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 20.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny and cold, with a high near 16.
Monday Night
Mostly clear, with a low around 2.
Tuesday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
Last Update:
1:26 pm CST Jan 21, 2026
Forecast Valid:
1pm CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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