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.

Mostly Cloudy and Breezy

73°F

23°C

Humidity 64%
Wind Speed S 21 G 37 mph
Barometer 29.77 in (1007.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 2 Apr 11:53 am CDT
Extended Forecast for

Granite City IL

Wind Advisory until April 2, 07:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until April 2, 07:00pm

    NOW until 7:00pm Thu

    Wind Advisory

  • This Afternoon

    High: 74 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind 13 to 18 mph becoming north 5 to 10 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 83. Southeast wind 5 to 14 mph becoming south in the morning. Winds could gust as high as 24 mph.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 56. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.

    Low: 56 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a steady temperature around 60. West wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

This Afternoon
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Breezy, with a south wind 20 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 70%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South wind 13 to 18 mph becoming north 5 to 10 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 83. Southeast wind 5 to 14 mph becoming south in the morning. Winds could gust as high as 24 mph.
Friday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 56. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a steady temperature around 60. West wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 40.
Wednesday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Granite City IL
 38.73°N 90.11°W (Elev. 417 ft)
Last Update:
10:56 am CDT Apr 2, 2026
Forecast Valid:
12pm CDT Apr 2, 2026-6pm CDT Apr 8, 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