Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
70°F
21°C
| Humidity | 25% |
| Wind Speed | N 13 G 18 mph |
| Barometer | 30.14 in (1020.6 mb) |
| Dewpoint | 32°F (0°C) |
| Visibility | 10.00 mi |
| Last update | 11 May 5:54 pm CDT |
Extended Forecast for
Decatur IL
Tonight
Low: 46 °F
Mostly Clear
Tuesday
High: 80 °F
Sunny then
Mostly Sunny
and BreezyTuesday Night
Low: 54 °F
Showers
Likely then
Slight Chance
T-stormsWednesday
High: 69 °F
Sunny
Wednesday Night
Low: 44 °F
Clear
Thursday
High: 69 °F
Sunny
Thursday Night
Low: 51 °F
Partly Cloudy
Friday
High: 77 °F
Showers
LikelyFriday Night
Low: 61 °F
Chance
T-storms
Detailed Forecast
Tonight
Mostly clear, with a low around 46. North northwest wind 5 to 9 mph becoming east southeast after midnight.
Tuesday
Mostly sunny, with a high near 80. Breezy, with a south southeast wind 9 to 14 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph.
Tuesday Night
Showers and thunderstorms likely, mainly before midnight. Mostly cloudy during the early evening, then gradual clearing, with a low around 54. West southwest wind 8 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Sunny, with a high near 69. Northwest wind 13 to 18 mph, with gusts as high as 33 mph.
Wednesday Night
Clear, with a low around 44. North northwest wind 9 to 14 mph becoming light north northeast after midnight. Winds could gust as high as 26 mph.
Thursday
Sunny, with a high near 69. North northeast wind around 5 mph becoming calm in the morning.
Thursday Night
Partly cloudy, with a low around 51. Light southeast wind becoming south southeast 8 to 13 mph in the evening. Winds could gust as high as 17 mph.
Friday
Showers likely, mainly before 1pm. Partly sunny, with a high near 77. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 40%.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 86.
Saturday Night
A chance of showers. Partly cloudy, with a low around 63.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
A chance of showers. Partly cloudy, with a low around 68.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 87.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.84°N 88.94°W (Elev. 692 ft)
39.84°N 88.94°W (Elev. 692 ft)
4:36 pm CDT May 11, 2026
6pm CDT May 11, 2026-6pm CDT May 18, 2026
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