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Deer Plain, Illinois Weather Forecast
Deer Plain, Illinois Weather
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Weather Forecast for Deer Plain, Illinois : Calhoun County
Issued: 5:01 am CST Dec 7, 2025 Latitude: 38.9317161 Longitude: -90.5331743 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
20% chance of snow on Overnight 20% chance of snow on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 40% chance of snow on Thursday Mostly Sunny on Friday Partly Sunny on Saturday
Low: 33°F High: 38°F High: 33°F High: 51°F High: 46°F High: 36°F High: 24°F High: 21°F
Low: 21°F Low: 25°F Low: 39°F Low: 27°F Low: 16°F Low: 5°F  
Snow Snow Mostly Sunny Mostly Sunny Partly Sunny Snow Mostly Sunny Partly Sunny
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Current Conditions at
ST CHARLES - (KSET)
34°
Mostly Cloudy
Mist
as of 4:54 AM CST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 5 Miles
Pressure: 29.92 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Broken at 3600ft
Current Conditions at
ST LOUIS - (KSTL)
37°
Mostly Cloudy
as of 4:51 AM CST
Rel. Humidity: 93%
Dew Point: 36°F
Visibility: 9 Miles
Pressure: 29.92 in.
Flight Rule: MVFR
Wind Data
3 MPH
180° South
Cloud Level(s): Broken at 1500ft, Broken at 3500ft
Current Conditions at
SPIRIT OF ST LOUIS - (KSUS)
36°
Cloudy
as of 4:54 AM CST
Rel. Humidity: 86%
Dew Point: 32°F
Visibility: 9 Miles
Pressure: 29.91 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 3100ft
Current Conditions at
LITCHFIELD MUNI ARP - (K3LF)
34°
Feels like 25°F
Cloudy
Mist
as of 4:55 AM CST
Rel. Humidity: 100%
Dew Point: 34°F
Visibility: 2 Miles
Pressure: 29.93 in.
Flight Rule: LIFR
Wind Data
10 MPH
160° South
Cloud Level(s): Solid Overcast at 300ft
20% chance of snow Overnight Overnight... A chance of sprinkles and flurries. Mostly cloudy, with a low around 33. Light southeast wind.

20% chance of snow Sunday Sunday... A chance of sprinkles and flurries before 7am, then a chance of sprinkles between 7am and 9am. Cloudy, with a high near 38. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 21. North wind 6 to 11 mph, with gusts as high as 21 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 33. Calm wind becoming southeast around 5 mph in the afternoon.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 25. Southeast wind 5 to 10 mph becoming southwest after midnight.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 51.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 39.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 46.

20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 27.

40% chance of snow Thursday Thursday... A 40 percent chance of snow. Mostly cloudy, with a high near 36.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 16.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 24.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 5.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 21.

Current Radar Image


Sun Almanac for Deer Plain, Illinois
Sunrise: 07:08 AM
Sunset: 4:40 PM
Civil Sunrise:06:38 AM
Civil Sunset: 5:09 PM
Nautical Sunrise: 06:05 AM
Nautical Sunset: 5:43 PM
Astro Sunrise: 05:32 AM
Astro Sunset: 6:15 PM
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