Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Light Rain
42°F
6°C
| Humidity | 82% |
| Wind Speed | E 7 mph |
| Barometer | 29.96 in (1015.2 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 7.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 14 Feb 4:54 pm CST |
Extended Forecast for
2 Miles ENE Harristown IL
This Afternoon

High: 48 °F
Rain Likely
Tonight

Low: 42 °F
Rain and
Patchy FogSunday
High: 59 °F
Patchy Fog
then SunnySunday Night

Low: 37 °F
Increasing
CloudsWashington's Birthday

High: 60 °F
Partly Sunny
Monday Night

Low: 42 °F
Mostly Cloudy
Tuesday

High: 62 °F
Mostly Cloudy
Tuesday Night

Low: 55 °F
Mostly Cloudy
and BreezyWednesday

High: 67 °F
Sunny and
Breezy
Detailed Forecast
This Afternoon
Rain likely. Cloudy, with a high near 48. South southeast wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly before 2am. Patchy fog after 4am. Low around 42. South southeast wind around 7 mph becoming northeast after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 59. North northeast wind 6 to 8 mph becoming west northwest in the afternoon.
Sunday Night
Increasing clouds, with a low around 37. West wind around 6 mph becoming calm.
Washington's Birthday
Partly sunny, with a high near 60. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 10 mph, with gusts as high as 17 mph.
Tuesday
Mostly cloudy, with a high near 62. South wind 9 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 55. Breezy.
Wednesday
Sunny, with a high near 67. Breezy.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
A chance of rain. Mostly sunny, with a high near 64.
Thursday Night
A chance of rain. Partly cloudy, with a low around 35.
Friday
Mostly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Partly sunny, with a high near 44.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
2 Miles ENE Harristown IL
39.84°N 89.03°W (Elev. 666 ft)
39.84°N 89.03°W (Elev. 666 ft)
5:36 pm CST Feb 14, 2026
5pm CST Feb 14, 2026-6pm CST Feb 21, 2026


