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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: 3:16 am CST Dec 21, 2025 Latitude: 38.6456062 Longitude: -90.160943 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Christmas Day Friday Saturday
Mostly Sunny on Today Mostly Clear on Tonight Increasing Clouds on Monday Sunny on Tuesday Cloudy on Wednesday Mostly Sunny on Christmas Day Partly Sunny on Friday Mostly Cloudy on Saturday
High: 45°F Low: 31°F High: 54°F High: 63°F High: 69°F High: 75°F High: 62°F High: 58°F
Low: 46°F Low: 46°F Low: 58°F Low: 50°F Low: 41°F  
Mostly Sunny Mostly Clear Increasing Clouds Sunny Cloudy Mostly Sunny Partly Sunny Mostly Cloudy
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Current Conditions at
ST LOUIS - (KSTL)
28°
Clear
as of 3:51 AM CST
Rel. Humidity: 63%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.36 in.
Flight Rule: VFR
Wind Data
5 MPH
260° West
Cloud Level(s): Clear
Current Conditions at
SCOTT AFB - (KBLV)
32°
Mostly Clear
as of 3:55 AM CST
Rel. Humidity: 63%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.34 in.
Flight Rule: VFR
Wind Data
6 MPH
0° North
Cloud Level(s): Few at 19000ft
Current Conditions at
ST CHARLES - (KSET)
32°
Clear
as of 3:54 AM CST
Rel. Humidity: 50%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.35 in.
Flight Rule: VFR
Wind Data
7 MPH
0° North
Cloud Level(s): Clear
Mostly Sunny on Today Today... Mostly sunny, with a high near 45. Calm wind becoming east around 5 mph in the afternoon.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 31. Southeast wind 3 to 6 mph.

Increasing Clouds on Monday Monday... Increasing clouds, with a high near 54. South wind 6 to 9 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 46. South wind 3 to 7 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 63. West wind around 6 mph becoming calm in the afternoon.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 46.

Cloudy on Wednesday Wednesday... Cloudy, with a high near 69.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 58.

Mostly Sunny on Christmas Day Christmas Day... Mostly sunny, with a high near 75.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 50.

Partly Sunny on Friday Friday... Partly sunny, with a high near 62.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 41.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 58.

Current Radar Image


Sun Almanac for National City, Illinois
Sunrise: 07:15 AM
Sunset: 4:43 PM
Civil Sunrise:06:45 AM
Civil Sunset: 5:13 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 5:46 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:18 PM
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