Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
64°F
18°C
| Humidity | 75% |
| Wind Speed | SW 5 mph |
| Barometer | 29.96 in (1014.2 mb) |
| Dewpoint | 56°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 22 Apr 11:54 pm CDT |
Extended Forecast for
Decatur IL
Overnight
Low: 58 °F
Mostly Clear
Thursday
High: 80 °F
Sunny
Thursday Night
Low: 61 °F
Partly Cloudy
then Chance
T-stormsFriday
High: 74 °F
Showers
Friday Night
Low: 52 °F
Chance
ShowersSaturday
High: 73 °F
Sunny
Saturday Night
Low: 50 °F
Partly Cloudy
Sunday
High: 74 °F
Partly Sunny
Sunday Night
Low: 60 °F
Chance
Showers then
Chance
T-storms
Detailed Forecast
Overnight
Mostly clear, with a low around 58. South wind around 7 mph.
Thursday
Sunny, with a high near 80. South wind 7 to 17 mph, with gusts as high as 28 mph.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61. South wind around 15 mph, with gusts as high as 25 mph.
Friday
Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 74. South wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 52. North northwest wind around 9 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 73. North northeast wind around 10 mph, with gusts as high as 16 mph.
Saturday Night
Partly cloudy, with a low around 50. East northeast wind around 9 mph, with gusts as high as 15 mph.
Sunday
Partly sunny, with a high near 74.
Sunday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Monday
Showers and possibly a thunderstorm. High near 75. Breezy. Chance of precipitation is 80%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 51. Breezy.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Mostly sunny, with a high near 66.
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)
12:36 am CDT Apr 23, 2026
12am CDT Apr 23, 2026-6pm CDT Apr 29, 2026
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