Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
78°F
26°C
| Humidity | 29% |
| Wind Speed | S 9 mph |
| Barometer | 29.97 in (1014.8 mb) |
| Dewpoint | 43°F (6°C) |
| Visibility | 10.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 19 Mar 3:53 pm CDT |
Extended Forecast for
Granite City IL
Tonight
Low: 50 °F
Mostly Clear
Friday
High: 82 °F
Sunny
Friday Night
Low: 52 °F
Partly Cloudy
Saturday
High: 81 °F
Sunny
Saturday Night
Low: 59 °F
Clear
Sunday
High: 86 °F
Mostly Sunny
Sunday Night
Low: 42 °F
Partly Cloudy
Monday
High: 59 °F
Mostly Sunny
Monday Night
Low: 40 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly clear, with a low around 50. South wind 3 to 6 mph.
Friday
Sunny, with a high near 82. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Saturday Night
Clear, with a low around 59. South wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 59.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
Mostly cloudy, with a low around 44.
Wednesday
Partly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 77.
Additional Forecasts and Information
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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)
3:31 pm CDT Mar 19, 2026
4pm CDT Mar 19, 2026-6pm CDT Mar 26, 2026
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