Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

39°F

4°C

Humidity 89%
Wind Speed S 3 mph
Barometer 29.95 in (1014.3 mb)
Dewpoint 36°F (2°C)
Visibility 8.00 mi
Last update 7 Dec 5:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: A chance of sprinkles before 11am.  Cloudy, with a high near 40. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 22 mph.

    High: 40 °F

    Chance
    Sprinkles

  • Tonight

    Tonight: Mostly cloudy, with a low around 22. North wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 5 mph becoming calm  in the morning.

    High: 34 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Calm wind becoming south 5 to 9 mph in the evening.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 53. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 53 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight.  Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A chance of rain and snow, mainly before noon.  Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
A chance of sprinkles before 11am. Cloudy, with a high near 40. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 22 mph.
Tonight
Mostly cloudy, with a low around 22. North wind 6 to 11 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 34. North wind around 5 mph becoming calm in the morning.
Monday Night
Partly cloudy, with a low around 26. Calm wind becoming south 5 to 9 mph in the evening.
Tuesday
Mostly sunny, with a high near 53. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 49.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 28.
Thursday
A chance of rain and snow, mainly before noon. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 26.
Friday Night
Mostly cloudy, with a low around 6.
Saturday
Partly sunny, with a high near 22.
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
5:01 am CST Dec 7, 2025
6am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
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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