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.

Overcast and Breezy

36°F

2°C

Humidity 76%
Wind Speed W 22 G 36 mph
Barometer 29.62 in (1003.1 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 15 Mar 10:53 pm CDT
Extended Forecast for

Granite City IL

Wind Advisory March 15, 11:43pm until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory March 15, 11:43pm until March 16, 12:00pm

    NOW until 12:00pm Mon

    Wind Advisory

  • Tonight

    Low: 23 °F

    Chance
    Rain/Snow and
    Blustery

  • Monday

    Monday: A slight chance of snow before noon, then scattered flurries between noon and 1pm. Cloudy, with a high near 29. Blustery, with a west wind 22 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 20%.

    High: 29 °F

    Slight Chance
    Snow and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. Northwest wind 10 to 18 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. Northwest wind 6 to 8 mph becoming southwest in the afternoon.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 31. Southeast wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 31 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 30 percent chance of rain before 7am. Mostly sunny, with a high near 62.

    High: 62 °F

    Chance Rain
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

Tonight
A chance of rain and snow before midnight, then a chance of snow between midnight and 4am. Mostly cloudy, with a low around 23. Blustery, with a northwest wind 18 to 25 mph, with gusts as high as 37 mph. Chance of precipitation is 40%.
Monday
A slight chance of snow before noon, then scattered flurries between noon and 1pm. Cloudy, with a high near 29. Blustery, with a west wind 22 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 15. Northwest wind 10 to 18 mph, with gusts as high as 26 mph.
Tuesday
Mostly sunny, with a high near 36. Northwest wind 6 to 8 mph becoming southwest in the afternoon.
Tuesday Night
A chance of snow before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 31. Southeast wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of rain before 7am. Mostly sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Mostly sunny, with a high near 74.
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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:
10:56 pm CDT Mar 15, 2026
Forecast Valid:
11pm CDT Mar 15, 2026-6pm CDT Mar 22, 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