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Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fog
73°F
23°C
| Humidity | 96% |
| Wind Speed | Calm |
| Barometer | 29.90 in (1012.0 mb) |
| Dewpoint | 72°F (22°C) |
| Visibility | 0.50 mi |
| Last update | 28 Jun 3:54 am CDT |
Extended Forecast for
Decatur IL
Heat Advisory June 29, 11:00am until July 3, 12:00am
Heat Advisory June 28, 01:00pm until June 28, 07:00pm
Dense Fog Advisory until June 28, 08:00am
NOW until 8:00am Sun
Dense Fog Advisory
Overnight
Low: 69 °F
Areas Fog
Sunday
High: 90 °F
Slight Chance
T-storms and
Areas Fog
then Mostly
SunnySunday Night
Low: 75 °F
Mostly Clear
Monday
High: 93 °F
Mostly Sunny
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 94 °F
Sunny
Tuesday Night
Low: 75 °F
Clear
Wednesday
High: 94 °F
Sunny
Detailed Forecast
Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 69. Light east southeast wind.
Sunday
A slight chance of showers and thunderstorms between 10am and 11am. Areas of fog before 9am. Otherwise, partly sunny, with a high near 90. Heat index values as high as 100. Light southeast wind becoming south southeast 5 to 9 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 75. South southeast wind 7 to 9 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 93. Heat index values as high as 107. South wind 8 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 75. South wind 8 to 13 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 94. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Clear, with a low around 75. South southwest wind 6 to 11 mph, with gusts as high as 17 mph.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 94.
Thursday Night
Mostly clear, with a low around 74.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 93.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
Sunny, with a high near 92.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.86°N 88.94°W (Elev. 682 ft)
39.86°N 88.94°W (Elev. 682 ft)
2:36 am CDT Jun 28, 2026
4am CDT Jun 28, 2026-6pm CDT Jul 4, 2026
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