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Hazardous Weather Conditions
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Mostly Cloudy
83°F
28°C
| Humidity | 43% |
| Wind Speed | S 12 G 26 mph |
| Barometer | 29.76 in (1007.5 mb) |
| Dewpoint | 58°F (14°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 23 Apr 3:53 pm CDT |
Extended Forecast for
Granite City IL
Tonight
Low: 64 °F
Partly Cloudy
then ShowersFriday
High: 76 °F
Showers then
Chance
T-stormsFriday Night

Low: 52 °F
Partly Cloudy
Saturday

High: 78 °F
Sunny
Saturday Night

Low: 55 °F
Partly Cloudy
Sunday
High: 75 °F
Slight Chance
Showers then
Slight Chance
T-stormsSunday Night

Low: 62 °F
Chance
T-stormsMonday
High: 80 °F
Chance
Showers then
T-storms
Likely and
BreezyMonday Night

Low: 55 °F
Chance
T-storms
Detailed Forecast
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 64. South wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Friday
Showers and thunderstorms before 11am, then a chance of showers and thunderstorms after noon. High near 76. South wind 8 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%.
Friday Night
Partly cloudy, with a low around 52. North wind around 6 mph.
Saturday
Sunny, with a high near 78. East wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 55. East wind around 6 mph.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 75. Chance of precipitation is 20%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Monday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 80. Breezy. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 55. Chance of precipitation is 50%.
Tuesday
Sunny, with a high near 73.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 51.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 72.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 67.
Additional Forecasts and Information
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ABOUT 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)
1:26 pm CDT Apr 23, 2026
4pm CDT Apr 23, 2026-6pm CDT Apr 30, 2026



