Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Mostly Cloudy
61°F
16°C
| Humidity | 90% |
| Wind Speed | SW 17 mph |
| Barometer | 29.84 in (1010.1 mb) |
| Dewpoint | 58°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 7 Mar 9:54 am CST |
Extended Forecast for
Decatur IL
Today

High: 63 °F⇓
Chance Rain
Tonight

Low: 35 °F
Decreasing
CloudsSunday

High: 62 °F
Sunny
Sunday Night

Low: 45 °F
Clear
Monday

High: 73 °F
Sunny
Monday Night

Low: 56 °F
Mostly Clear
Tuesday
High: 76 °F
Mostly Sunny
then Showers
LikelyTuesday Night

Low: 48 °F
Showers and
BreezyWednesday
High: 60 °F
Breezy.
Showers then
Chance
Showers
Detailed Forecast
Today
A 30 percent chance of rain, mainly before 11am. Cloudy, with a temperature falling to around 46 by 5pm. West northwest wind 13 to 16 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 62. Southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 45. South southwest wind around 11 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 73. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 56. South southwest wind around 10 mph, with gusts as high as 18 mph.
Tuesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 76. South wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers, with thunderstorms also possible after midnight. Low around 48. Breezy. Chance of precipitation is 90%.
Wednesday
Showers, mainly before noon. High near 60. Breezy. Chance of precipitation is 80%.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
Mostly cloudy, with a low around 38.
Friday
Mostly cloudy, with a high near 60. Breezy.
Additional Forecasts and Information
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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)
10:06 am CST Mar 7, 2026
10am CST Mar 7, 2026-6pm CDT Mar 13, 2026


