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Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
67°F
19°C
| Humidity | 73% |
| Wind Speed | W 3 mph |
| Barometer | 30.04 in (1017.0 mb) |
| Dewpoint | 58°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 11 Oct 10:54 am CDT |
Extended Forecast for
Decatur IL
Today
High: 84 °F
Sunny
Tonight
Low: 62 °F
Mostly Clear
Columbus Day
High: 91 °F
Sunny
Monday Night
Low: 71 °F
Clear
Tuesday
High: 90 °F
Sunny
Tuesday Night
Low: 66 °F
Chance
T-storms then
Showers
LikelyWednesday
High: 79 °F
Showers
LikelyWednesday Night
Low: 59 °F
Showers
LikelyThursday
High: 75 °F
Showers
Likely
Detailed Forecast
Today
Sunny, with a high near 84. Light and variable wind.
Tonight
Mostly clear, with a low around 62. South wind 3 to 8 mph.
Columbus Day
Sunny, with a high near 91. Southwest wind 7 to 15 mph, with gusts as high as 21 mph.
Monday Night
Clear, with a low around 71. Southwest wind 10 to 13 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 90. West southwest wind 11 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 66. West wind around 6 mph becoming northeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 79. Northeast wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Thursday
Showers likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 52. Breezy.
Friday
Partly sunny, with a high near 66. Breezy.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 59.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.86°N 88.94°W (Elev. 682 ft)
39.86°N 88.94°W (Elev. 682 ft)
10:46 am CDT Oct 11, 2026
11am CDT Oct 11, 2026-6pm CDT Oct 17, 2026
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