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Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
70°F
21°C
| Humidity | 71% |
| Wind Speed | S 6 mph |
| Barometer | 30.17 in (1021.1 mb) |
| Dewpoint | 60°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 3 Oct 9:54 pm CDT |
Extended Forecast for
Harristown IL
Tonight
Low: 63 °F
Mostly Clear
Saturday
High: 86 °F
Sunny
Saturday Night
Low: 58 °F
Clear
Sunday
High: 85 °F
Sunny
Sunday Night
Low: 63 °F
Mostly Clear
Monday
High: 86 °F
Sunny
Monday Night
Low: 62 °F
Chance
ShowersTuesday
High: 77 °F
Chance
ShowersTuesday Night
Low: 51 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly clear, with a low around 63. South wind around 6 mph.
Saturday
Sunny, with a high near 86. South southwest wind 5 to 14 mph, with gusts as high as 17 mph.
Saturday Night
Clear, with a low around 58. South wind 7 to 9 mph.
Sunday
Sunny, with a high near 85. South wind 8 to 17 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 63. South wind 8 to 10 mph, with gusts as high as 16 mph.
Monday
Sunny, with a high near 86. South southwest wind 6 to 10 mph.
Monday Night
A 50 percent chance of showers. Partly cloudy, with a low around 62. South wind 6 to 8 mph.
Tuesday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 76.
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 pm CDT Oct 3, 2025
10pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
Additional Resources
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Hourly Weather Forecast
