Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

6°F

-14°C

Humidity 66%
Wind Speed NW 12 mph
Barometer 30.39 in (1029.8 mb)
Dewpoint -3°F (-19°C)
Visibility 10.00 mi
Wind Chill-10°F (-23°C)
Last update 25 Jan 11:53 pm CST
Extended Forecast for

Granite City IL

Extreme Cold Warning until January 26, 12:00pm
Click here for hazard details and duration
Extreme Cold Warning
  •  
    Extreme Cold Warning until January 26, 12:00pm

    NOW until 12:00pm Mon

    Extreme Cold Warning

  • Overnight

    Low: -6 °F

    Mostly Clear

  • Monday

    Monday: Sunny and cold, with a high near 16. Wind chill values as low as -20. Northwest wind 7 to 9 mph becoming southwest in the afternoon.

    High: 16 °F

    Cold

  • Monday Night

    Monday Night: Clear, with a low around 6. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 6 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31. Southwest wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 31 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around -1. Northwest wind around 6 mph becoming calm  in the evening.

    Low: -1 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 2.

    Low: 2 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a high near 19.

    High: 19 °F

    Cold

Detailed Forecast

Overnight
Mostly clear, with a low around -6. Wind chill values as low as -20. Northwest wind around 8 mph.
Monday
Sunny and cold, with a high near 16. Wind chill values as low as -20. Northwest wind 7 to 9 mph becoming southwest in the afternoon.
Monday Night
Clear, with a low around 6. Southwest wind 6 to 10 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 31. Southwest wind 7 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around -1. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 27.
Wednesday Night
Partly cloudy, with a low around 2.
Thursday
Partly sunny and cold, with a high near 19.
Thursday Night
Mostly cloudy, with a low around 4.
Friday
Partly sunny and cold, with a high near 19.
Friday Night
Partly cloudy, with a low around -1.
Saturday
Sunny, with a high near 22.
Saturday Night
Partly cloudy, with a low around 6.
Sunday
Partly sunny, with a high near 30.
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
10:16 pm CST Jan 25, 2026
12am CST Jan 26, 2026-6pm CST Feb 1, 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