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Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
67°F
19°C
| Humidity | 53% |
| Wind Speed | W 5 mph |
| Barometer | 30.21 in (1022.7 mb) |
| Dewpoint | 49°F (9°C) |
| Visibility | 10.00 mi |
| Last update | 4 Oct 9:54 am CDT |
Extended Forecast for
Harristown IL
Today
High: 78 °F
Sunny
Tonight
Low: 47 °F
Mostly Clear
Monday
High: 72 °F
Sunny
Monday Night
Low: 45 °F
Clear
Tuesday
High: 76 °F
Sunny
Tuesday Night
Low: 54 °F
Clear
Wednesday
High: 80 °F
Sunny
Wednesday Night
Low: 51 °F
Mostly Clear
Thursday
High: 79 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 78. Light west wind becoming north northwest 5 to 10 mph in the morning.
Tonight
Mostly clear, with a low around 47. North wind 6 to 8 mph.
Monday
Sunny, with a high near 72. East northeast wind 5 to 7 mph.
Monday Night
Clear, with a low around 45. East northeast wind around 5 mph becoming light and variable.
Tuesday
Sunny, with a high near 76. South wind 6 to 10 mph.
Tuesday Night
Clear, with a low around 54. South southwest wind around 6 mph.
Wednesday
Sunny, with a high near 80. West northwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Harristown IL
39.84°N 89.06°W (Elev. 699 ft)
39.84°N 89.06°W (Elev. 699 ft)
9:36 am CDT Oct 4, 2026
9am CDT Oct 4, 2026-6pm CDT Oct 10, 2026
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