Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
70°F
21°C
| Humidity | 90% |
| Wind Speed | Calm |
| Barometer | 29.97 in (1014.3 mb) |
| Dewpoint | 67°F (19°C) |
| Visibility | 10.00 mi |
| Last update | 19 Aug 1:54 am CDT |
Extended Forecast for
4 Miles WSW Sullivan IL
Overnight
Low: 66 °F
Slight Chance
ShowersWednesday
High: 80 °F
Showers
LikelyWednesday Night
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
Detailed Forecast
Overnight
A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 66. Light south wind.
Wednesday
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. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
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.
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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Forecast AreaABOUT 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)
1:26 am CDT Aug 19, 2026
2am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
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