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Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Mostly Cloudy
64°F
18°C
| Humidity | 78% |
| Wind Speed | E 9 mph |
| Barometer | 30.09 in (1018.6 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 15 Oct 1:54 am CDT |
Extended Forecast for
Assumption IL
Overnight
Low: 63 °F
Slight Chance
ShowersThursday
High: 77 °F
Showers
Thursday Night
Low: 45 °F
Showers
Likely then
Chance
ShowersFriday
High: 56 °F
Breezy.
Partly Sunny
then Chance
ShowersFriday Night
Low: 36 °F
Mostly Cloudy
then Patchy
FrostSaturday
High: 59 °F
Areas Frost
then SunnySaturday Night
Low: 34 °F
Clear then
Areas FrostSunday
High: 68 °F
Frost then
SunnySunday Night
Low: 37 °F
Mostly Clear
Detailed Forecast
Overnight
A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 63. East wind around 7 mph.
Thursday
Showers and possibly a thunderstorm. High near 77. East wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 3am. Increasing clouds, with a low around 45. Southwest wind 10 to 18 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 4pm. Partly sunny, with a high near 56. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 30 mph.
Friday Night
Patchy frost after 5am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 36. North wind 9 to 14 mph, with gusts as high as 22 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the afternoon.
Saturday Night
Areas of frost after 3am. Otherwise, clear, with a low around 34. Calm wind.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 37.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 77.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Assumption IL
39.51°N 89.05°W (Elev. 636 ft)
39.51°N 89.05°W (Elev. 636 ft)
1:55 am CDT Oct 15, 2026
2am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
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