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Douglas, Illinois Weather Forecast
Douglas, Illinois Weather
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Weather Forecast for Douglas, Illinois : St. Clair County
Issued: 3:15 am CST Jan 20, 2026 Latitude: 38.4244948 Longitude: -89.9826053 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Overnight Mostly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday Mostly Cloudy on Friday 40% chance of snow on Saturday Mostly Sunny on Sunday Sunny on Monday
Low: 9 °F High: 36°F High: 46°F High: 37°F High: 19°F High: 15°F High: 24°F High: 28°F
Low: 27°F Low: 24°F Low: 12°F Low: 4°F Low: 7°F Low: 7°F  
Mostly Clear Mostly Sunny Mostly Cloudy Mostly Sunny Mostly Cloudy Snow Mostly Sunny Sunny
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Current Conditions at
SCOTT AFB - (KBLV)
9°
Clear
as of 2:55 AM CST
Rel. Humidity: 78%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 30.44 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
EAST ST LOUIS - (KCPS)
9°
Clear
as of 2:53 AM CST
Rel. Humidity: 71%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.45 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
14°
Clear
as of 3:15 AM CST
Rel. Humidity: 51%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.46 in.
Flight Rule: VFR
Wind Data
3 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
14°
Mostly Cloudy
as of 2:51 AM CST
Rel. Humidity: 56%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.43 in.
Flight Rule: VFR
Wind Data
3 MPH
220° Southwest
Cloud Level(s): Broken at 7000ft
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 9. Light south wind.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 36. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Increasing Clouds on Tuesday Night Tuesday Night... Increasing clouds, with a low around 27. South wind 11 to 14 mph, with gusts as high as 23 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, then gradually becoming sunny, with a high near 46. West wind 6 to 13 mph, with gusts as high as 21 mph.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 24. West wind 5 to 7 mph becoming northwest after midnight.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 37.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 12.
Mostly Cloudy on Friday Friday... Mostly cloudy and cold, with a high near 19.
30% chance of snow Friday Night Friday Night... A 30 percent chance of snow. Mostly cloudy, with a low around 4.
40% chance of snow Saturday Saturday... A 40 percent chance of snow. Mostly cloudy and cold, with a high near 15.
30% chance of snow Saturday Night Saturday Night... A 30 percent chance of snow. Mostly cloudy, with a low around 7.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 24.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 7.
Sunny on Monday Monday... Sunny, with a high near 28.
Current Radar Image


Sun Almanac for Douglas, Illinois
Sunrise: 07:13 AM
Sunset: 5:09 PM
Civil Sunrise:06:45 AM
Civil Sunset: 5:37 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 6:10 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:41 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.