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

63°F

17°C

Humidity 34%
Wind Speed NW 12 mph
Barometer 30.31 in (1026.4 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 6 Apr 12:53 pm CDT
Extended Forecast for

Granite City IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 64. Northwest wind around 9 mph.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 39. North wind 6 to 8 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 55. Northeast wind around 9 mph.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. East wind around 8 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73. Southeast wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 64. Northwest wind around 9 mph.
Tonight
Increasing clouds, with a low around 39. North wind 6 to 8 mph.
Tuesday
Partly sunny, with a high near 55. Northeast wind around 9 mph.
Tuesday Night
Partly cloudy, with a low around 40. East wind around 8 mph.
Wednesday
Mostly sunny, with a high near 73. Southeast wind 7 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Sunny, with a high near 77.
Thursday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 58.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.71°N 90.11°W (Elev. 413 ft)
Last Update:
1:26 pm CDT Apr 6, 2026
Forecast Valid:
2pm CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation