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National City, Illinois Weather Forecast
National City, Illinois Weather
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Weather Forecast for National City, Illinois : St. Clair County
Issued: 4:11 am CST Dec 11, 2025 Latitude: 38.6456062 Longitude: -90.160943 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Friday Saturday Sunday Monday Tuesday Wednesday
20% chance of snow on Today Mostly Cloudy on Tonight Mostly Cloudy on Friday 40% chance of snow on Saturday Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday
High: 35°F Low: 32°F High: 40°F High: 28°F High: 17°F High: 41°F High: 45°F High: 53°F
Low: 23°F Low: 3°F Low: 8°F Low: 26°F Low: 37°F  
Snow Mostly Cloudy Mostly Cloudy Snow Sunny Sunny Mostly Sunny Mostly Cloudy
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Current Conditions at
EAST ST LOUIS - (KCPS)
28°
Cloudy
as of 5:53 AM CST
Rel. Humidity: 74%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.07 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Broken at 2700ft, Solid Overcast at 12000ft
Current Conditions at
ST LOUIS - (KSTL)
28°
Mostly Cloudy
as of 5:51 AM CST
Rel. Humidity: 74%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
3 MPH
280° West
Cloud Level(s): Scattered at 2500ft, Broken at 12000ft
Current Conditions at
SCOTT AFB - (KBLV)
27°
Partly Cloudy
as of 6:05 AM CST
Rel. Humidity: 73%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
3 MPH
300° Northwest
Cloud Level(s): Scattered at 2600ft
Current Conditions at
ST CHARLES - (KSET)
27°
Mostly Clear
as of 5:54 AM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
7 MPH
040° Northeast
Cloud Level(s): Few at 12000ft
20% chance of snow Today Today... A slight chance of snow between 3pm and 4pm. Cloudy, with a high near 35. Light and variable wind becoming southeast 5 to 8 mph in the afternoon. Chance of precipitation is 20%.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 32. Southeast wind 6 to 8 mph becoming northwest after midnight.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 40. Northwest wind 8 to 10 mph.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 23. Northwest wind around 6 mph.
40% chance of snow Saturday Saturday... A 40 percent chance of snow, mainly after noon. Cloudy, with a high near 28. North wind 5 to 8 mph.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 3.
Sunny on Sunday Sunday... Sunny and cold, with a high near 17.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 8.
Sunny on Monday Monday... Sunny, with a high near 41.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 26.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 45.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 37.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 53.
Current Radar Image


Sun Almanac for National City, Illinois
Sunrise: 07:09 AM
Sunset: 4:39 PM
Civil Sunrise:06:39 AM
Civil Sunset: 5:09 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 5:42 PM
Astro Sunrise: 05:34 AM
Astro Sunset: 6:15 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.