Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
23°F
-5°C
| Humidity | 65% |
| Wind Speed | S 9 mph |
| Barometer | 30.20 in (1023.8 mb) |
| Dewpoint | 13°F (-11°C) |
| Visibility | 10.00 mi |
| Wind Chill | 13°F (-11°C) |
| Last update | 1 Feb 6:54 pm CST |
Extended Forecast for
Decatur IL
Tonight
Low: 18 °F
Snow Likely
then Slight
Chance SnowMonday

High: 30 °F
Mostly Cloudy
Monday Night

Low: 19 °F
Mostly Cloudy
Tuesday

High: 29 °F
Decreasing
CloudsTuesday Night

Low: 11 °F
Partly Cloudy
Wednesday

High: 26 °F
Mostly Sunny
Wednesday Night

Low: 9 °F
Partly Cloudy
Thursday

High: 33 °F
Partly Sunny
Thursday Night

Low: 27 °F
Partly Cloudy
Detailed Forecast
Tonight
Snow likely, mainly before midnight. Cloudy, with a low around 18. South wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 30. West northwest wind 5 to 9 mph.
Monday Night
Mostly cloudy, with a low around 19. Light and variable wind.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 29. Northeast wind 3 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 11. North wind around 6 mph.
Wednesday
Mostly sunny, with a high near 26. North wind around 5 mph becoming light and variable in the afternoon.
Wednesday Night
Partly cloudy, with a low around 9. Calm wind becoming west southwest around 5 mph after midnight.
Thursday
Partly sunny, with a high near 33.
Thursday Night
Partly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 37.
Friday Night
Partly cloudy, with a low around 15.
Saturday
Mostly sunny, with a high near 28.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
Partly sunny, with a high near 35.
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)
6:51 pm CST Feb 1, 2026
7pm CST Feb 1, 2026-6pm CST Feb 8, 2026



