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Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
77°F
25°C
| Humidity | 54% |
| Wind Speed | SW 13 mph |
| Barometer | 29.85 in (1010.1 mb) |
| Dewpoint | 59°F (15°C) |
| Visibility | 8.00 mi |
| Heat Index | 79°F (26°C) |
| Last update | 12 Oct 9:54 pm CDT |
Extended Forecast for
Clinton IL
Tonight
Low: 68 °F
Mostly Clear
Tuesday
High: 91 °F
Sunny
Tuesday Night
Low: 68 °F
Slight Chance
T-storms then
Showers
LikelyWednesday
High: 79 °F
Showers
LikelyWednesday Night
Low: 59 °F
Mostly Cloudy
then Chance
ShowersThursday
High: 74 °F
Showers
Thursday Night
Low: 50 °F
Chance
Showers and
BreezyFriday
High: 61 °F
Mostly Sunny
and BreezyFriday Night
Low: 37 °F
Partly Cloudy
and Breezy
then Mostly
Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 68. Southwest wind around 14 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 91. West southwest wind 11 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 68. Southwest wind around 7 mph becoming southeast in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers likely, mainly between 7am and 1pm. Mostly cloudy, with a high near 79. West wind 6 to 9 mph becoming north northeast in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 59. Northeast wind 11 to 13 mph, with gusts as high as 17 mph.
Thursday
Showers, with thunderstorms also possible after 1pm. High near 74. East northeast wind around 11 mph becoming south in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 50. Breezy, with a west northwest wind 13 to 21 mph, with gusts as high as 28 mph.
Friday
Mostly sunny, with a high near 61. Breezy.
Friday Night
Mostly clear, with a low around 37. Breezy.
Saturday
Sunny, with a high near 61.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 73.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Clinton IL
40.15°N 88.95°W (Elev. 715 ft)
40.15°N 88.95°W (Elev. 715 ft)
10:36 pm CDT Oct 12, 2026
10pm CDT Oct 12, 2026-6pm CDT Oct 19, 2026
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