Granite City, Illinois Weather
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Weather Forecast for Granite City, Illinois : Madison County
Issued: 2:21 am CDT Sep 16, 2025 Latitude: 38.7014389 Longitude: -90.1487199 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Cloudy on Overnight Sunny on Tuesday Sunny on Wednesday Mostly Sunny on Thursday 40% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 30% chance of thunderstorms on Sunday 30% chance of thunderstorms on Monday
Low: 64°F High: 95°F High: 94°F High: 96°F High: 88°F High: 86°F High: 87°F High: 88°F
Low: 66°F Low: 65°F Low: 69°F Low: 66°F Low: 67°F Low: 67°F  
Cloudy Sunny Sunny Mostly Sunny Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
EAST ST LOUIS - (KCPS)
66°
Clear
as of 2:53 AM CDST
Rel. Humidity: 88%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
72°
Mostly Clear
as of 2:51 AM CDST
Rel. Humidity: 73%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Few at 25000ft
Current Conditions at
ALTON - (KALN)
64°
Clear
as of 3:35 AM CDST
Rel. Humidity: 93%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
SCOTT AFB - (KBLV)
70°
Clear
as of 2:55 AM CDST
Rel. Humidity: 88%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Cloudy on Overnight Overnight... Partly cloudy, with a low around 64. Light north wind.
Sunny on Tuesday Tuesday... Sunny, with a high near 95. Calm wind becoming northeast 5 to 8 mph in the afternoon.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 66. East wind 3 to 6 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 94. Light northeast wind.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 65. Light southeast wind.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 96.
20% chance of rain Thursday Night Thursday Night... A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 69.
40% chance of thunderstorms Friday Friday... A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 40%.
50% chance of thunderstorms Friday Night Friday Night... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
30% chance of thunderstorms Saturday Saturday... A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
30% chance of thunderstorms Saturday Night Saturday Night... A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
30% chance of thunderstorms Sunday Sunday... A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
40% chance of thunderstorms Sunday Night Sunday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
30% chance of thunderstorms Monday Monday... A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Current Radar Image


Sun Almanac for Granite City, Illinois
Sunrise: 06:44 AM
Sunset: 7:07 PM
Civil Sunrise:06:17 AM
Civil Sunset: 7:34 PM
Nautical Sunrise: 05:46 AM
Nautical Sunset: 8:05 PM
Astro Sunrise: 05:14 AM
Astro Sunset: 8:37 PM
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