Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
47°F
8°C
| Humidity | 48% |
| Wind Speed | N 13 mph |
| Barometer | 30.25 in (1024.4 mb) |
| Dewpoint | 28°F (-2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 19 Apr 9:54 pm CDT |
Extended Forecast for
Decatur IL
Frost Advisory April 20, 01:00am until April 20, 08:00am
Tonight
Low: 33 °F
Mostly Clear
then Areas
FrostMonday
High: 61 °F
Frost then
SunnyMonday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 77 °F
Mostly Sunny
Tuesday Night
Low: 59 °F
Chance
T-stormsWednesday
High: 78 °F
Mostly Sunny
Wednesday Night
Low: 58 °F
Mostly Clear
Thursday
High: 80 °F
Sunny then
Mostly Sunny
and BreezyThursday Night
Low: 61 °F
Chance
Showers and
Breezy then
Showers
Likely
Detailed Forecast
Tonight
Areas of frost after 3am. Otherwise, clear, with a low around 33. North wind 3 to 7 mph. Winds could gust as high as 15 mph.
Monday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 61. Light and variable wind becoming east around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 47. South wind 7 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 77. Southwest wind 11 to 18 mph, with gusts as high as 29 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 78. West southwest wind around 9 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind 8 to 10 mph, with gusts as high as 16 mph.
Thursday
Sunny, with a high near 80. Breezy.
Thursday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 61. Breezy. Chance of precipitation is 70%.
Friday
Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Friday Night
A chance of showers. Partly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Mostly sunny, with a high near 68.
Additional Forecasts and Information
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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)
9:36 pm CDT Apr 19, 2026
10pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
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