Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
53°F
12°C
| Humidity | 41% |
| Wind Speed | W 9 G 18 mph |
| Barometer | 30.19 in (1022.4 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 50°F (10°C) |
| Last update | 19 Apr 9:54 am CDT |
Extended Forecast for
2 Miles ENE Harristown IL
Frost Advisory April 20, 01:00am until April 20, 08:00am
Today
High: 60 °F
Sunny then
Partly Sunny
and BreezyTonight
Low: 33 °F
Partly Cloudy
then FrostMonday
High: 61 °F
Areas Frost
then SunnyMonday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 77 °F
Mostly Sunny
then Sunny
and BreezyTuesday Night
Low: 57 °F
Partly Cloudy
Wednesday
High: 78 °F
Mostly Sunny
Wednesday Night
Low: 58 °F
Mostly Clear
Thursday
High: 81 °F
Sunny then
Mostly Sunny
and Breezy
Detailed Forecast
Today
Increasing clouds, with a high near 60. Breezy, with a west wind 14 to 21 mph, with gusts as high as 32 mph.
Tonight
Widespread frost, mainly after 5am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 33. North northeast wind 5 to 14 mph, with gusts as high as 23 mph.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 61. Northeast wind 5 to 7 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 47. South wind 8 to 14 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 77. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
Partly cloudy, with a low around 57. West southwest wind 10 to 14 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 78. Southwest wind around 10 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Mostly sunny, with a high near 81. Breezy.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73.
Friday Night
Showers likely. Mostly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 67.
Additional Forecasts and Information
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Forecast AreaABOUT 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)
9:36 am CDT Apr 19, 2026
10am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
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