National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

56°F

13°C

Humidity 93%
Wind Speed W 5 mph
Barometer 29.85 in (1010.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 25 Nov 10:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: Cloudy, with a high near 58. West wind 7 to 9 mph.

    High: 58 °F

    Cloudy

  • Tonight

    Tonight: Isolated showers between 7pm and 9pm. Cloudy during the early evening, then gradual clearing, with a low around 36. West wind 8 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Isolated
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46. Breezy, with a west wind 13 to 20 mph, with gusts as high as 33 mph.

    High: 46 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. West wind 7 to 10 mph.

    Low: 29 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 43. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 43 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of snow before midnight, then rain and snow likely. Cloudy, with a low around 32. Chance of precipitation is 60%.

    Low: 32 °F

    Chance Snow
    then
    Rain/Snow
    Likely

  • Saturday

    Saturday: Rain and snow. High near 39. Chance of precipitation is 80%.

    High: 39 °F

    Rain/Snow

Detailed Forecast

Today
Cloudy, with a high near 58. West wind 7 to 9 mph.
Tonight
Isolated showers between 7pm and 9pm. Cloudy during the early evening, then gradual clearing, with a low around 36. West wind 8 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 46. Breezy, with a west wind 13 to 20 mph, with gusts as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 29. West wind 7 to 10 mph.
Thanksgiving Day
Sunny, with a high near 43. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 23.
Friday
Mostly sunny, with a high near 40.
Friday Night
A chance of snow before midnight, then rain and snow likely. Cloudy, with a low around 32. Chance of precipitation is 60%.
Saturday
Rain and snow. High near 39. Chance of precipitation is 80%.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 30. Chance of precipitation is 60%.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 40.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 29.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 40.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.71°N 90.14°W (Elev. 410 ft)
Last Update:
9:21 am CST Nov 25, 2025
Forecast Valid:
11am CST Nov 25, 2025-6pm CST Dec 1, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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