Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

63°F

17°C

Humidity 41%
Wind Speed SW 7 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 19 Mar 10:53 am CDT
Extended Forecast for

Granite City IL

  • Today

    Today: A chance of sprinkles before 1pm.  Cloudy early, then gradual clearing, with a high near 75. South wind 5 to 7 mph.

    High: 75 °F

    Chance
    Sprinkles

  • Tonight

    Tonight: Mostly clear, with a low around 50. South wind 3 to 6 mph.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. Light southwest wind becoming west 8 to 13 mph in the morning.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. West wind around 6 mph becoming calm  in the evening.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

Detailed Forecast

Today
A chance of sprinkles before 1pm. Cloudy early, then gradual clearing, with a high near 75. South wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 50. South wind 3 to 6 mph.
Friday
Sunny, with a high near 82. Light southwest wind becoming west 8 to 13 mph in the morning.
Friday Night
Partly cloudy, with a low around 52. West wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Mostly cloudy, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
10:36 am CDT Mar 19, 2026
11am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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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