Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
82°F
28°C
| Humidity | 51% |
| Wind Speed | NE 3 mph |
| Barometer | 30.12 in (1019.4 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 28 Aug 5:54 pm CDT |
Extended Forecast for
Assumption IL
Tonight
Low: 61 °F
Mostly Clear
Saturday
High: 87 °F
Mostly Sunny
Saturday Night
Low: 68 °F
Partly Cloudy
Sunday
High: 92 °F
Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 96 °F
Hot
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 98 °F
Hot
Tuesday Night
Low: 76 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly clear, with a low around 61. Calm wind becoming southeast around 5 mph after midnight.
Saturday
Mostly sunny, with a high near 87. South wind 3 to 7 mph.
Saturday Night
Partly cloudy, with a low around 68. South southeast wind 5 to 7 mph.
Sunday
Sunny, with a high near 92. South southwest wind 7 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 72. South wind around 8 mph.
Monday
Sunny and hot, with a high near 96. South southwest wind 8 to 11 mph, with gusts as high as 17 mph.
Monday Night
Mostly clear, with a low around 75. South wind 6 to 8 mph.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Partly cloudy, with a low around 76.
Wednesday
Mostly sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Mostly sunny and hot, with a high near 97.
Thursday Night
Mostly clear, with a low around 74.
Friday
Mostly sunny and hot, with a high near 96.
Additional Forecasts and Information
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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)
5:01 pm CDT Aug 28, 2026
5pm CDT Aug 28, 2026-6pm CDT Sep 4, 2026
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