


Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
66°F
19°C
Humidity | 75% |
Wind Speed | S 14 mph |
Barometer | 29.80 in (1008.6 mb) |
Dewpoint | 58°F (14°C) |
Visibility | 10.00 mi |
Last update | 17 Oct 11:54 pm CDT |
Extended Forecast for
Decatur IL
Overnight
Low: 62 °F
Mostly Clear
Saturday
High: 75 °F
Showers
Saturday Night
Low: 49 °F
Showers
Sunday
High: 61 °F
Chance
Showers and
BreezySunday Night
Low: 42 °F
Clear
Monday
High: 69 °F
Sunny then
Sunny and
BreezyMonday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 60 °F
Sunny
Tuesday Night
Low: 38 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly clear, with a low around 62. South southwest wind around 11 mph, with gusts as high as 18 mph.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. High near 75. South southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 49. South southwest wind 9 to 18 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Sunday
A 30 percent chance of showers before 1pm. Mostly cloudy through mid morning, then gradual clearing, with a high near 61. Breezy, with a west northwest wind 18 to 22 mph, with gusts as high as 31 mph.
Sunday Night
Clear, with a low around 42. West wind 5 to 11 mph becoming south southwest after midnight. Winds could gust as high as 16 mph.
Monday
Sunny, with a high near 69. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
Mostly clear, with a low around 47. South southwest wind 11 to 15 mph becoming west after midnight. Winds could gust as high as 22 mph.
Tuesday
Sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
A chance of showers. Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 65.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.84°N 88.94°W (Elev. 692 ft)
39.84°N 88.94°W (Elev. 692 ft)
12:31 am CDT Oct 18, 2025
12am CDT Oct 18, 2025-6pm CDT Oct 24, 2025