Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fog/Mist
71°F
22°C
| Humidity | 94% |
| Wind Speed | SE 3 mph |
| Barometer | 29.95 in (1013.8 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 6.00 mi |
| Last update | 19 Aug 7:54 am CDT |
Extended Forecast for
4 Miles WSW Sullivan IL
Today

High: 80 °F
Showers
LikelyTonight

Low: 63 °F
Showers
LikelyThursday

High: 81 °F
Mostly Sunny
Thursday Night

Low: 60 °F
Mostly Clear
Friday

High: 83 °F
Sunny
Friday Night

Low: 63 °F
Mostly Clear
Saturday

High: 82 °F
Sunny
Saturday Night

Low: 61 °F
Mostly Clear
Sunday

High: 80 °F
Sunny
Detailed Forecast
Today
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 80. West southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 63. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 81. Calm wind becoming northeast 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 60. Light east northeast wind.
Friday
Sunny, with a high near 83. Calm wind becoming west southwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 63. Calm wind.
Saturday
Sunny, with a high near 82. Light west northwest wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 16 mph.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 84.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
4 Miles WSW Sullivan IL
39.57°N 88.67°W (Elev. 676 ft)
39.57°N 88.67°W (Elev. 676 ft)
7:36 am CDT Aug 19, 2026
8am CDT Aug 19, 2026-6pm CDT Aug 25, 2026



