Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
41°F
5°C
| Humidity | 65% |
| Wind Speed | SW 5 mph |
| Barometer | 30.16 in (1021.7 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 19 Apr 12:54 am CDT |
Extended Forecast for
2 Miles ENE Harristown IL
Frost Advisory April 20, 01:00am until April 20, 08:00am
Frost Advisory April 19, 01:48am until April 19, 08:00am
NOW until 8:00am Sun
Frost Advisory
Overnight
Low: 36 °F
Areas Frost
Sunday
High: 60 °F
Areas Frost
then Mostly
Sunny and
BreezySunday Night
Low: 33 °F
Mostly Clear
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
Detailed Forecast
Overnight
Areas of frost after 3am. Otherwise, mostly clear, with a low around 36. Southwest wind around 7 mph.
Sunday
Areas of frost before 8am. Otherwise, increasing clouds, with a high near 60. Breezy, with a west wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. North northeast wind 5 to 14 mph, with gusts as high as 21 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.
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. Mostly cloudy, with a low around 62.
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)
1:26 am CDT Apr 19, 2026
1am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
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