Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

17°F

-8°C

Humidity 62%
Wind Speed W 7 mph
Barometer 30.20 in (1023.5 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 27 Jan 4:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: Sunny, with a high near 29. West wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 29 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 0. Northwest wind around 6 mph becoming calm  in the evening.

    Low: 0 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 30. Calm wind becoming west 5 to 7 mph.

    High: 30 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 9. Light and variable wind.

    Low: 9 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy and cold, with a high near 20. Calm wind becoming north around 6 mph in the afternoon.

    High: 20 °F

    Cold

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 1.

    Low: 1 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near 16.

    High: 16 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around 0.

    Low: 0 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 19.

    High: 19 °F

    Cold

Detailed Forecast

Today
Sunny, with a high near 29. West wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 0. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 30. Calm wind becoming west 5 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 9. Light and variable wind.
Thursday
Mostly cloudy and cold, with a high near 20. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 1.
Friday
Mostly sunny and cold, with a high near 16.
Friday Night
Mostly clear, with a low around 0.
Saturday
Mostly sunny and cold, with a high near 19.
Saturday Night
Partly cloudy, with a low around 2.
Sunday
Partly sunny, with a high near 26.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Partly sunny, with a high near 34.
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
4:21 am CST Jan 27, 2026
4am CST Jan 27, 2026-6pm CST Feb 2, 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