Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
41°F
5°C
| Humidity | 67% |
| Wind Speed | W 10 mph |
| Barometer | 29.96 in (1015.0 mb) |
| Dewpoint | 31°F (-1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 35°F (2°C) |
| Last update | 12 Nov 4:54 am CST |
Extended Forecast for
Harristown IL
Today
High: 58 °F
Sunny
Tonight
Low: 34 °F
Partly Cloudy
Thursday
High: 61 °F
Mostly Sunny
Thursday Night
Low: 43 °F
Partly Cloudy
Friday
High: 70 °F
Mostly Sunny
Friday Night
Low: 54 °F
Partly Cloudy
Saturday
High: 74 °F
Partly Sunny
Saturday Night
Low: 42 °F
Partly Cloudy
Sunday
High: 58 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 58. West northwest wind 9 to 16 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 34. West wind 5 to 9 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 61. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 43. South wind around 8 mph.
Friday
Mostly sunny, with a high near 70. South southwest wind 7 to 10 mph.
Friday Night
Partly cloudy, with a low around 54. South southwest wind 8 to 11 mph, with gusts as high as 17 mph.
Saturday
Partly sunny, with a high near 74. South southwest wind 13 to 18 mph, with gusts as high as 26 mph.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 33.
Monday
A chance of rain. Mostly sunny, with a high near 53.
Monday Night
A chance of rain. Mostly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 55.
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)
3:36 am CST Nov 12, 2025
5am CST Nov 12, 2025-6pm CST Nov 18, 2025
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