Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
57°F
14°C
| Humidity | 62% |
| Wind Speed | Calm |
| Barometer | 30.11 in (1019.4 mb) |
| Dewpoint | 44°F (7°C) |
| Visibility | 10.00 mi |
| Last update | 21 Apr 2:53 am CDT |
Extended Forecast for
Granite City IL
Overnight

Low: 50 °F
Mostly Clear
Tuesday

High: 81 °F
Mostly Sunny
Tuesday Night

Low: 58 °F
Mostly Clear
Wednesday

High: 79 °F
Sunny
Wednesday Night

Low: 59 °F
Mostly Clear
Thursday

High: 83 °F
Mostly Sunny
Thursday Night
Low: 63 °F
Mostly Cloudy
then Showers
LikelyFriday

High: 77 °F
Showers
Friday Night

Low: 56 °F
Chance
T-storms
Detailed Forecast
Overnight
Mostly clear, with a low around 50. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 81. Southwest wind 6 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 58. Southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 79. West wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 59. South wind around 6 mph.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Friday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Saturday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 53.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Chance of precipitation is 60%.
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)
3:01 am CDT Apr 21, 2026
3am CDT Apr 21, 2026-6pm CDT Apr 27, 2026


