Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
71°F
22°C
| Humidity | 73% |
| Wind Speed | S 20 G 32 mph |
| Barometer | 29.83 in (1009.5 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 15 Apr 6:54 pm CDT |
Extended Forecast for
2 Miles ENE Harristown IL
Tonight
Low: 61 °F
T-storms
Thursday
High: 78 °F
Decreasing
CloudsThursday Night
Low: 55 °F
Mostly Clear
Friday
High: 83 °F
Mostly Sunny
then Chance
ShowersFriday Night
Low: 49 °F
Showers
Saturday
High: 60 °F
Chance
Showers and
BreezySaturday Night
Low: 37 °F
Mostly Clear
Sunday
High: 58 °F
Sunny
Sunday Night
Low: 38 °F
Mostly Clear
Detailed Forecast
Tonight
Showers and thunderstorms before 3am, then a chance of showers. Low around 61. South southwest wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Southwest wind 13 to 15 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 55. West wind around 6 mph becoming southeast after midnight.
Friday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. South southeast wind 8 to 18 mph, with gusts as high as 28 mph.
Friday Night
Showers and possibly a thunderstorm. Low around 49. South wind around 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Saturday
A 50 percent chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 60. Breezy, with a west northwest wind 17 to 20 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 37. West northwest wind 10 to 16 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 38.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Mostly sunny, with a high near 75. Breezy.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Mostly sunny, with a high near 74.
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)
7:36 pm CDT Apr 15, 2026
7pm CDT Apr 15, 2026-6pm CDT Apr 22, 2026
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