Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
53°F
12°C
| Humidity | 45% |
| Wind Speed | W 15 G 31 mph |
| Barometer | 30.03 in (1017.1 mb) |
| Dewpoint | 32°F (0°C) |
| Visibility | 10.00 mi |
| Wind Chill | 48°F (9°C) |
| Last update | 18 Apr 4:54 pm CDT |
Extended Forecast for
Decatur IL
Frost Advisory April 19, 01:00am until April 19, 08:00am
Tonight
Low: 37 °F
Clear then
Patchy FrostSunday
High: 59 °F
Patchy Frost
then Mostly
SunnySunday Night
Low: 33 °F
Mostly Clear
then Patchy
FrostMonday
High: 60 °F
Patchy Frost
then SunnyMonday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 76 °F
Mostly Sunny
Tuesday Night
Low: 57 °F
Chance
ShowersWednesday
High: 78 °F
Mostly Sunny
Wednesday Night
Low: 59 °F
Mostly Clear
Detailed Forecast
Tonight
Patchy frost after 5am. Otherwise, clear, with a low around 37. West southwest wind 6 to 15 mph, with gusts as high as 25 mph.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 59. West southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 33. North northwest wind 8 to 13 mph becoming light north after midnight. Winds could gust as high as 21 mph.
Monday
Patchy frost before 8am. Otherwise, sunny, with a high near 60. Light and variable wind becoming south around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 47. South wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 76. Southwest wind 11 to 17 mph, with gusts as high as 29 mph.
Tuesday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 57. Southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 62.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73.
Friday Night
A chance of showers. Mostly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 65.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.84°N 88.94°W (Elev. 692 ft)
39.84°N 88.94°W (Elev. 692 ft)
5:21 pm CDT Apr 18, 2026
5pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
