Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Partly Cloudy
36°F
2°C
| Humidity | 70% |
| Wind Speed | SW 9 mph |
| Barometer | 30.04 in (1017.9 mb) |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 29°F (-2°C) |
| Last update | 10 Jan 5:54 pm CST |
Extended Forecast for
Decatur IL
Tonight
Low: 24 °F
Rain/Snow
Likely and
BlusterySunday
High: 34 °F
Mostly Sunny
and Breezy
then SunnySunday Night

Low: 26 °F
Mostly Clear
Monday

High: 44 °F
Mostly Sunny
Monday Night

Low: 34 °F
Partly Cloudy
Tuesday

High: 53 °F
Partly Sunny
Tuesday Night

Low: 33 °F
Mostly Cloudy
Wednesday

High: 39 °F
Mostly Cloudy
Wednesday Night

Low: 18 °F
Partly Cloudy
Detailed Forecast
Tonight
Snow showers likely, possibly mixed with rain before 10pm, then a slight chance of snow showers after midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Blustery, with a west northwest wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Sunny, with a high near 34. Breezy, with a west northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 33 mph.
Sunday Night
Mostly clear, with a low around 26. Southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 44. West southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 34. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 53. West southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 33. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 39.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Mostly sunny, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
A chance of snow. Mostly cloudy, with a high near 38.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 29.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.84°N 88.94°W (Elev. 692 ft)
39.84°N 88.94°W (Elev. 692 ft)
3:17 pm CST Jan 10, 2026
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026



