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Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
63°F
17°C
| Humidity | 81% |
| Wind Speed | Calm |
| Barometer | 29.93 in (1013.2 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 29 Jul 3:54 am CDT |
Extended Forecast for
Decatur Airport IL
Today
High: 83 °F
Sunny
Tonight
Low: 60 °F
Mostly Clear
Thursday
High: 84 °F
Sunny
Thursday Night
Low: 64 °F
Partly Cloudy
Friday
High: 78 °F
Showers
LikelyFriday Night
Low: 64 °F
Showers
Saturday
High: 76 °F
Showers
LikelySaturday Night
Low: 62 °F
Chance
T-stormsSunday
High: 79 °F
Mostly Sunny
then Chance
T-storms
Detailed Forecast
Today
Sunny, with a high near 83. North northeast wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 60. Northeast wind 3 to 7 mph.
Thursday
Sunny, with a high near 84. Southeast wind 3 to 5 mph.
Thursday Night
Partly cloudy, with a low around 64. Southeast wind 3 to 6 mph.
Friday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 78. South wind 7 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers and possibly a thunderstorm. Low around 64. South southeast wind 13 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76. East wind 14 to 17 mph becoming north in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 62.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 63.
Monday
A chance of showers and thunderstorms. Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 64.
Tuesday
A chance of showers and thunderstorms. Sunny, with a high near 84.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Decatur Airport IL
39.84°N 88.85°W (Elev. 686 ft)
39.84°N 88.85°W (Elev. 686 ft)
3:36 am CDT Jul 29, 2026
4am CDT Jul 29, 2026-6pm CDT Aug 4, 2026
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