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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

58°F

14°C

Humidity 67%
Wind Speed N 6 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 8 Oct 12:54 am CDT
Extended Forecast for

5 Miles SSE Assumption IL

  • Overnight

    Overnight: Clear, with a low around 53. Light north wind.

    Low: 53 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 82. Light and variable wind.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Light and variable wind.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. South wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59. South southeast wind around 6 mph.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 84. South wind 6 to 9 mph, with gusts as high as 15 mph.

    High: 84 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 57. East southeast wind 6 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 57 °F

    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers before 1pm. Partly sunny, with a high near 75.

    High: 75 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 53. Light north wind.
Thursday
Sunny, with a high near 82. Light and variable wind.
Thursday Night
Clear, with a low around 53. Light and variable wind.
Friday
Sunny, with a high near 86. South wind 5 to 9 mph, with gusts as high as 15 mph.
Friday Night
Clear, with a low around 59. South southeast wind around 6 mph.
Saturday
Increasing clouds, with a high near 84. South wind 6 to 9 mph, with gusts as high as 15 mph.
Saturday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 57. East southeast wind 6 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 75.
Sunday Night
Mostly clear, with a low around 55.
Columbus Day
Sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Assumption IL
 39.45°N 89.02°W (Elev. 699 ft)
Last Update:
1:11 am CDT Oct 8, 2026
Forecast Valid:
1am CDT Oct 8, 2026-6pm CDT Oct 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation