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Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
66°F
19°C
| Humidity | 73% |
| Wind Speed | NE 10 mph |
| Barometer | 30.10 in (1019.0 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 14 Oct 11:54 pm CDT |
Extended Forecast for
Chestnut IL
Overnight
Low: 61 °F
Slight Chance
ShowersThursday
High: 75 °F
Showers
Thursday Night
Low: 47 °F
Breezy.
Showers
Likely then
Chance
ShowersFriday
High: 57 °F
Breezy.
Partly Sunny
then Chance
ShowersFriday Night
Low: 37 °F
Decreasing
CloudsSaturday
High: 60 °F
Areas Frost
then SunnySaturday Night
Low: 36 °F
Clear
Sunday
High: 66 °F
Areas Frost
then SunnySunday Night
Low: 40 °F
Mostly Clear
Detailed Forecast
Overnight
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 61. East northeast wind around 9 mph, with gusts as high as 17 mph.
Thursday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 11am, then showers and possibly a thunderstorm after 11am. High near 75. East wind 7 to 13 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 4am. Mostly cloudy, with a low around 47. Breezy, with a southwest wind 14 to 21 mph becoming northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 57. Breezy, with a northwest wind 21 to 24 mph, with gusts as high as 36 mph.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 37. North wind 10 to 17 mph, with gusts as high as 23 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 60. North wind around 6 mph becoming calm in the morning.
Saturday Night
Clear, with a low around 36. Calm wind becoming south around 6 mph after midnight.
Sunday
Areas of frost before 7am. Otherwise, sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 78.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Chestnut IL
40.07°N 89.19°W (Elev. 600 ft)
40.07°N 89.19°W (Elev. 600 ft)
11:51 pm CDT Oct 14, 2026
12am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
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