National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

52°F

11°C

Humidity 75%
Wind Speed W 7 mph
Barometer 30.07 in (1018.4 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 10 Nov 7:54 am CST
Extended Forecast for

Assumption IL

  • Today

    Today: Sunny, with a high near 68. West northwest wind 5 to 7 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 43. North wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Increasing
    Clouds

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 66. South wind 5 to 10 mph becoming west northwest 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 38. North northwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 48. North northwest wind 11 to 15 mph, with gusts as high as 21 mph.

    High: 48 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 29. North northwest wind 7 to 11 mph, with gusts as high as 17 mph.

    Low: 29 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 43. North northwest wind 7 to 11 mph, with gusts as high as 17 mph.

    High: 43 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 68. West northwest wind 5 to 7 mph.
Tonight
Increasing clouds, with a low around 43. North wind around 5 mph becoming calm in the evening.
Veterans Day
Mostly sunny, with a high near 66. South wind 5 to 10 mph becoming west northwest 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 38. North northwest wind 11 to 14 mph, with gusts as high as 22 mph.
Thursday
Partly sunny, with a high near 48. North northwest wind 11 to 15 mph, with gusts as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 29. North northwest wind 7 to 11 mph, with gusts as high as 17 mph.
Friday
Sunny, with a high near 43. North northwest wind 7 to 11 mph, with gusts as high as 17 mph.
Friday Night
Mostly clear, with a low around 23.
Saturday
Sunny, with a high near 47.
Saturday Night
Mostly clear, with a low around 28.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 32.
Monday
Mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Assumption IL
 39.51°N 89.05°W (Elev. 636 ft)
Last Update:
5:16 am CST Nov 10, 2026
Forecast Valid:
8am CST Nov 10, 2026-6pm CST Nov 16, 2026
 
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