Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
A Few Clouds
46°F
8°C
| Humidity | 66% |
| Wind Speed | W 9 mph |
| Barometer | 29.69 in (1005.6 mb) |
| Dewpoint | 35°F (2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 14 Jan 12:54 am CST |
Extended Forecast for
2 Miles ENE Harristown IL
Overnight
Low: 33 °F
Mostly Cloudy
Wednesday
High: 34 °F⇓
Breezy.
Chance
Sprinkles/Flurries
then Mostly
SunnyWednesday Night
Low: 15 °F
Mostly Clear
Thursday
High: 28 °F
Sunny
Thursday Night
Low: 23 °F
Snow Likely
Friday
High: 38 °F
Mostly Cloudy
and BreezyFriday Night
Low: 14 °F
Mostly Cloudy
Saturday
High: 20 °F
Mostly Cloudy
Saturday Night
Low: 6 °F
Partly Cloudy
Detailed Forecast
Overnight
Mostly cloudy, with a low around 33. Northwest wind 10 to 14 mph, with gusts as high as 26 mph.
Wednesday
A chance of sprinkles and flurries before 7am, then a chance of flurries between 7am and 10am. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 25 by 5pm. Breezy, with a north northwest wind 15 to 22 mph, with gusts as high as 34 mph.
Wednesday Night
Mostly clear, with a low around 15. Wind chill values between 2 and 10. North northwest wind 10 to 16 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 28. Wind chill values between 2 and 12. North northwest wind 8 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 16 mph.
Thursday Night
Snow likely. Mostly cloudy, with a low around 23. South southwest wind 9 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Friday
Mostly cloudy, with a high near 38. Breezy, with a west wind 16 to 20 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, with a low around 14. West northwest wind 15 to 17 mph, with gusts as high as 23 mph.
Saturday
Mostly cloudy, with a high near 20.
Saturday Night
Partly cloudy, with a low around 6.
Sunday
Mostly sunny, with a high near 22.
Sunday Night
Partly cloudy, with a low around 11.
M.L.King Day
Mostly sunny, with a high near 25.
Monday Night
Partly cloudy, with a low around 6.
Tuesday
Mostly sunny, with a high near 23.
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 pm CST Jan 13, 2026
1am CST Jan 14, 2026-6pm CST Jan 20, 2026
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