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.

Overcast

58°F

14°C

Humidity 93%
Wind Speed Calm
Barometer 29.86 in (1011.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 21 Nov 12:53 pm CST
Extended Forecast for

Granite City IL

  • This Afternoon

    This Afternoon: A 50 percent chance of rain. Patchy fog between 2pm and 3pm. Otherwise, cloudy, with a high near 56. Northeast wind around 7 mph.

    High: 56 °F

    Chance Rain
    and Patchy
    Fog

  • Tonight

    Tonight: A 40 percent chance of rain before 3am. Cloudy, with a low around 44. North wind 6 to 9 mph.

    Low: 44 °F

    Chance Rain

  • Saturday

    Saturday: Cloudy through mid morning, then gradual clearing, with a high near 58. North wind 5 to 7 mph becoming west in the afternoon.

    High: 58 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40. Southwest wind around 6 mph becoming calm after midnight.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63. Light and variable wind.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Rain likely, mainly after noon. Cloudy, with a high near 59. Chance of precipitation is 70%.

    High: 59 °F

    Chance Rain
    then Rain
    Likely

  • Monday Night

    Monday Night: Rain, mainly before midnight. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain then
    Chance Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain before noon. Partly sunny, with a high near 63.

    High: 63 °F

    Slight Chance
    Rain then
    Partly Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of rain. Patchy fog between 2pm and 3pm. Otherwise, cloudy, with a high near 56. Northeast wind around 7 mph.
Tonight
A 40 percent chance of rain before 3am. Cloudy, with a low around 44. North wind 6 to 9 mph.
Saturday
Cloudy through mid morning, then gradual clearing, with a high near 58. North wind 5 to 7 mph becoming west in the afternoon.
Saturday Night
Mostly clear, with a low around 40. Southwest wind around 6 mph becoming calm after midnight.
Sunday
Sunny, with a high near 63. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Rain likely, mainly after noon. Cloudy, with a high near 59. Chance of precipitation is 70%.
Monday Night
Rain, mainly before midnight. Low around 50. Chance of precipitation is 80%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 48.
Wednesday Night
Partly cloudy, with a low around 28.
Thanksgiving Day
Mostly sunny, with a high near 45.
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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:
11:11 am CST Nov 21, 2025
Forecast Valid:
1pm CST Nov 21, 2025-6pm CST Nov 27, 2025
 
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