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.

Fair

68°F

20°C

Humidity 57%
Wind Speed W 8 mph
Barometer 29.73 in (1006.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 7 Nov 10:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: Sunny, with a high near 71. West wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. West wind 3 to 7 mph.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 68. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 68 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 37. Southeast wind 7 to 15 mph becoming northwest in the evening. Winds could gust as high as 22 mph.

    Low: 37 °F

    Chance Rain

  • Sunday

    Sunday: A slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly sunny, with a high near 42. Northwest wind 14 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 42 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 71. West wind 9 to 13 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 40. West wind 3 to 7 mph.
Saturday
A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 68. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Saturday Night
A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 37. Southeast wind 7 to 15 mph becoming northwest in the evening. Winds could gust as high as 22 mph.
Sunday
A slight chance of rain and snow between noon and 3pm, then a slight chance of snow after 3pm. Mostly sunny, with a high near 42. Northwest wind 14 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 26.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Mostly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.71°N 90.11°W (Elev. 413 ft)
Last Update:
10:36 am CST Nov 7, 2025
Forecast Valid:
11am CST Nov 7, 2025-6pm CST Nov 13, 2025
 
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