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

37°F

3°C

Humidity 86%
Wind Speed Calm
Barometer 29.95 in (1014.2 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 11 Nov 3:54 am CST
Extended Forecast for

2 Miles NE Assumption IL

  • Overnight

    Overnight: Partly cloudy, with a low around 40. Light south wind.

    Low: 40 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Increasing clouds, with a high near 66. Light and variable wind becoming west 11 to 16 mph in the morning. Winds could gust as high as 25 mph.

    High: 66 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40. North northwest wind 9 to 16 mph, with gusts as high as 26 mph.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 48. North northwest wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 48 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 30. North northwest wind 8 to 14 mph, with gusts as high as 21 mph.

    Low: 30 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 43. North northwest wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 43 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24. North northwest wind around 6 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 40. Light south wind.
Veterans Day
Increasing clouds, with a high near 66. Light and variable wind becoming west 11 to 16 mph in the morning. Winds could gust as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 40. North northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Thursday
Mostly cloudy, with a high near 48. North northwest wind 11 to 17 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 30. North northwest wind 8 to 14 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 43. North northwest wind 8 to 13 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 24. North northwest wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 46.
Saturday Night
Mostly clear, with a low around 24.
Sunday
Sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 26.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 27.
Tuesday
Sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NE Assumption IL
 39.53°N 89.02°W (Elev. 627 ft)
Last Update:
3:16 am CST Nov 11, 2026
Forecast Valid:
3am CST Nov 11, 2026-6pm CST Nov 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation