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.

Partly Cloudy

56°F

13°C

Humidity 77%
Wind Speed S 6 mph
Barometer 29.74 in (1006.9 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 7 Nov 12:53 am CST
Extended Forecast for

Granite City IL

  • Overnight

    Overnight: A 20 percent chance of rain before 5am. Cloudy, with a low around 55. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Slight Chance
    Rain

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 71. West wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 71 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 45. West wind 5 to 7 mph becoming calm in the evening.

    Low: 45 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 67 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • 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 28.

    Low: 28 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain before 5am. Cloudy, with a low around 55. South wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 71. West wind 9 to 13 mph, with gusts as high as 20 mph.
Friday Night
Increasing clouds, with a low around 45. West wind 5 to 7 mph becoming calm in the evening.
Saturday
A 30 percent chance of rain after noon. Partly sunny, with a high near 67. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Saturday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 35. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 26.
Monday
Sunny, with a high near 43.
Monday Night
Mostly clear, with a low around 28.
Veterans Day
Mostly sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.71°N 90.14°W (Elev. 410 ft)
Last Update:
1:26 am CST Nov 7, 2025
Forecast Valid:
1am 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