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Allen, Illinois Weather Forecast
Allen, Illinois Weather
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Weather Forecast for Allen, Illinois : Mason County
Issued: 6:36 pm CST Dec 21, 2025 Latitude: 40.3050423 Longitude: -89.649551 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Christmas Day Friday Saturday Sunday
Cloudy on Tonight Partly Sunny on Monday Sunny on Tuesday Cloudy on Wednesday Partly Sunny on Christmas Day Sunny on Friday Mostly Cloudy on Saturday Sunny on Sunday
Low: 27°F High: 47°F High: 54°F High: 57°F High: 65°F High: 58°F High: 53°F High: 37°F
Low: 38°F Low: 36°F Low: 54°F Low: 48°F Low: 39°F Low: 26°F  
Cloudy Partly Sunny Sunny Cloudy Partly Sunny Sunny Mostly Cloudy Sunny
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Current Conditions at
LOGAN COUNTY AIRPORT - (KAAA)
30°
Clear
as of 6:55 PM CST
Rel. Humidity: 74%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.47 in.
Flight Rule: VFR
Wind Data
3 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
PEORIA - (KPIA)
30°
Feels like 21°F
Clear
as of 6:54 PM CST
Rel. Humidity: 68%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.42 in.
Flight Rule: VFR
Wind Data
9 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
SPRINGFIELD - (KSPI)
30°
Clear
as of 6:52 PM CST
Rel. Humidity: 68%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.45 in.
Flight Rule: VFR
Wind Data
6 MPH
140° Southeast
Cloud Level(s): Clear
Current Conditions at
BLOOMINGTON - (KBMI)
27°
Feels like 16°F
Clear
as of 6:56 PM CST
Rel. Humidity: 73%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.44 in.
Flight Rule: VFR
Wind Data
10 MPH
170° South
Cloud Level(s): Clear
Cloudy on Tonight Tonight... Partly cloudy, with a low around 27. South southeast wind 6 to 9 mph, with gusts as high as 20 mph.

Partly Sunny on Monday Monday... Partly sunny, with a high near 47. South wind 8 to 13 mph, with gusts as high as 22 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 38. South wind 6 to 8 mph, with gusts as high as 17 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 54. Southwest wind around 6 mph becoming calm in the afternoon.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 36. Calm wind becoming east southeast 5 to 7 mph after midnight. Winds could gust as high as 15 mph.

Cloudy on Wednesday Wednesday... Cloudy, with a high near 57. South wind 6 to 8 mph, with gusts as high as 17 mph.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 54. South southwest wind around 6 mph, with gusts as high as 15 mph.

Partly Sunny on Christmas Day Christmas Day... Partly sunny, with a high near 65.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 48.

Sunny on Friday Friday... Sunny, with a high near 58.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 39.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 53.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 26.

Sunny on Sunday Sunday... Sunny, with a high near 37.

Current Radar Image


Sun Almanac for Allen, Illinois
Sunrise: 07:18 AM
Sunset: 4:36 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:06 PM
Nautical Sunrise: 06:13 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:14 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.