Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
56°F
13°C
| Humidity | 90% |
| Wind Speed | Calm |
| Barometer | 30.16 in (1020.9 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 23 Jul 1:54 am CDT |
Extended Forecast for
Decatur IL
Overnight
Low: 54 °F
Clear
Thursday
High: 77 °F
Sunny
Thursday Night
Low: 58 °F
Partly Cloudy
Friday
High: 77 °F
Mostly Cloudy
Friday Night
Low: 62 °F
Chance
ShowersSaturday
High: 83 °F
Mostly Cloudy
Saturday Night
Low: 69 °F
Partly Cloudy
Sunday
High: 90 °F
Mostly Sunny
Sunday Night
Low: 73 °F
Partly Cloudy
Detailed Forecast
Overnight
Clear, with a low around 54. Light northeast wind.
Thursday
Sunny, with a high near 77. East northeast wind 3 to 7 mph.
Thursday Night
Partly cloudy, with a low around 58. East northeast wind 3 to 6 mph.
Friday
Mostly cloudy, with a high near 77. Light and variable wind becoming south southeast around 6 mph in the morning.
Friday Night
A 30 percent chance of showers after 7pm. Mostly cloudy, with a low around 62. Light south southeast wind.
Saturday
Mostly cloudy, with a high near 83. South wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 69. South wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
Partly cloudy, with a low around 73.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Sunny, with a high near 88.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.86°N 88.94°W (Elev. 682 ft)
39.86°N 88.94°W (Elev. 682 ft)
1:26 am CDT Jul 23, 2026
2am CDT Jul 23, 2026-6pm CDT Jul 29, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
