Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
42°F
6°C
| Humidity | 79% |
| Wind Speed | S 6 mph |
| Barometer | 29.97 in (1014.9 mb) |
| Dewpoint | 36°F (2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 9 Feb 10:53 pm CST |
Extended Forecast for
Granite City IL
Tonight
Low: 41 °F
Clear
Tuesday
High: 62 °F
Sunny
Tuesday Night
Low: 30 °F
Partly Cloudy
Wednesday
High: 51 °F
Mostly Sunny
Wednesday Night
Low: 32 °F
Mostly Cloudy
Thursday
High: 46 °F
Cloudy
Thursday Night
Low: 33 °F
Slight Chance
RainFriday
High: 47 °F
Mostly Cloudy
Friday Night
Low: 36 °F
Chance Rain
Detailed Forecast
Tonight
Clear, with a low around 41. South wind around 7 mph.
Tuesday
Sunny, with a high near 62. South wind 6 to 11 mph becoming north in the afternoon.
Tuesday Night
Partly cloudy, with a low around 30. North wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 51. North wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 32. Calm wind.
Thursday
Cloudy, with a high near 46.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 33.
Friday
Mostly cloudy, with a high near 47.
Friday Night
A 30 percent chance of rain, mainly after midnight. Cloudy, with a low around 36.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 48. Chance of precipitation is 70%.
Saturday Night
Rain. Low around 38. Chance of precipitation is 80%.
Sunday
A 40 percent chance of rain. Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 35.
Washington's Birthday
Mostly sunny, with a high near 58.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Granite City IL
38.73°N 90.11°W (Elev. 417 ft)
38.73°N 90.11°W (Elev. 417 ft)
10:31 pm CST Feb 9, 2026
11pm CST Feb 9, 2026-6pm CST Feb 16, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
