National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

46°F

8°C

Humidity 47%
Wind Speed SW 7 mph
Barometer 29.95 in (1014.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 13 Jan 4:53 am CST
Extended Forecast for

Granite City IL

  • Today

    Today: Increasing clouds, with a high near 64. West wind 6 to 14 mph, with gusts as high as 26 mph.

    High: 64 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 40 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 37. West wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 32 by 5pm. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 40 °F⇓

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 18. North wind 7 to 14 mph, with gusts as high as 23 mph.

    Low: 18 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 34. Northwest wind around 7 mph becoming south in the afternoon.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow. Mostly cloudy, with a temperature rising to around 34 by 5am.

    Low: 29 °F⇑

    Slight Chance
    Snow

  • Friday

    Friday: Partly sunny, with a high near 44. Breezy.

    High: 44 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 20%.

    Low: 21 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

Detailed Forecast

Today
Increasing clouds, with a high near 64. West wind 6 to 14 mph, with gusts as high as 26 mph.
Tonight
A 40 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 37. West wind 8 to 11 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a temperature falling to around 32 by 5pm. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 18. North wind 7 to 14 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 34. Northwest wind around 7 mph becoming south in the afternoon.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a temperature rising to around 34 by 5am.
Friday
Partly sunny, with a high near 44. Breezy.
Friday Night
A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 20%.
Saturday
Mostly cloudy, with a high near 32.
Saturday Night
Mostly cloudy, with a low around 11.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Mostly clear, with a low around 14.
M.L.King Day
Mostly sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
Last Update:
5:21 am CST Jan 13, 2026
Forecast Valid:
5am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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