Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
81°F
27°C
| Humidity | 77% |
| Wind Speed | SW 3 mph |
| Barometer | 29.95 in (1013.4 mb) |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 86°F (30°C) |
| Last update | 5 Sep 7:54 am CDT |
Extended Forecast for
Assumption IL
Extreme Heat Warning September 5, 08:11am until September 5, 07:00pm
NOW until 7:00pm Sat
Extreme Heat Warning
Today
High: 98 °F
Hot
Tonight
Low: 67 °F
Partly Cloudy
Sunday
High: 87 °F
Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Labor Day
High: 87 °F
Sunny
Monday Night
Low: 62 °F
Mostly Clear
Tuesday
High: 94 °F
Sunny
Tuesday Night
Low: 72 °F
Mostly Clear
Detailed Forecast
Today
Sunny and hot, with a high near 98. Heat index values as high as 106. Calm wind becoming north northwest 5 to 8 mph in the morning.
Tonight
Partly cloudy, with a low around 67. Northeast wind 6 to 8 mph.
Sunday
Sunny, with a high near 87. East northeast wind 7 to 10 mph, with gusts as high as 15 mph.
Sunday Night
Mostly clear, with a low around 60. East wind 5 to 8 mph.
Labor Day
Sunny, with a high near 87. East wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 62. East wind 3 to 7 mph.
Tuesday
Sunny, with a high near 94. South wind 3 to 7 mph.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 67.
Thursday
A chance of showers. Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Sunny, with a high near 86.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Assumption IL
39.51°N 89.05°W (Elev. 636 ft)
39.51°N 89.05°W (Elev. 636 ft)
7:36 am CDT Sep 5, 2026
8am CDT Sep 5, 2026-6pm CDT Sep 11, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
