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

61°F

16°C

Humidity 90%
Wind Speed W 5 mph
Barometer 29.93 in (1013.3 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 19 Jun 1:54 am CDT
Extended Forecast for

2 Miles WNW Decatur Airport IL

  • Overnight

    Overnight: Clear, with a low around 57. Calm wind.

    Low: 57 °F

    Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 78. West northwest wind 3 to 8 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. West northwest wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming west around 6 mph in the morning.

    High: 81 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 62. Calm wind becoming east southeast around 6 mph after midnight.

    Low: 62 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 1pm. Some of the storms could produce heavy rainfall. High near 77. Southeast wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 77 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 62. South wind 14 to 16 mph becoming north after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    Low: 62 °F

    Showers

  • Monday

    Monday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 57. Calm wind.
Juneteenth
Sunny, with a high near 78. West northwest wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around 61. West northwest wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming west around 6 mph in the morning.
Saturday Night
Increasing clouds, with a low around 62. Calm wind becoming east southeast around 6 mph after midnight.
Sunday
Showers, with thunderstorms also possible after 1pm. Some of the storms could produce heavy rainfall. High near 77. Southeast wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
Showers and possibly a thunderstorm. Low around 62. South wind 14 to 16 mph becoming north after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Monday
Partly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Decatur Airport IL
 39.86°N 88.91°W (Elev. 686 ft)
Last Update:
1:26 am CDT Jun 19, 2026
Forecast Valid:
2am CDT Jun 19, 2026-6pm CDT Jun 25, 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