News Headlines
Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
89°F
32°C
| Humidity | 45% |
| Wind Speed | SW 13 mph |
| Barometer | 29.89 in (1011.6 mb) |
| Dewpoint | 65°F (18°C) |
| Visibility | 7.00 mi |
| Heat Index | 91°F (33°C) |
| Last update | 13 Oct 1:54 pm CDT |
Extended Forecast for
Decatur IL
This Afternoon
High: 90 °F
Sunny
Tonight
Low: 69 °F
Mostly Clear
then Chance
T-stormsWednesday
High: 77 °F
Chance
Showers then
Chance
T-stormsWednesday Night
Low: 61 °F
Mostly Cloudy
then Chance
ShowersThursday
High: 77 °F
Showers
Thursday Night
Low: 46 °F
Showers
Likely and
BreezyFriday
High: 59 °F
Mostly Sunny
and BreezyFriday Night
Low: 34 °F
Mostly Clear
Saturday
High: 62 °F
Areas Frost
then Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 90. West southwest wind around 10 mph, with gusts as high as 15 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 69. Southwest wind 5 to 7 mph becoming north after midnight.
Wednesday
A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 77. North northeast wind 3 to 7 mph.
Wednesday Night
A 30 percent chance of showers after 5am. Mostly cloudy, with a low around 61. East northeast wind 8 to 10 mph.
Thursday
Showers and possibly a thunderstorm before 1pm, then showers between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 77. East wind 7 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers likely and possibly a thunderstorm before 10pm, then showers likely between 10pm and 1am. Mostly cloudy, with a low around 46. Breezy, with a west wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 59. Breezy, with a northwest wind 22 to 24 mph, with gusts as high as 34 mph.
Friday Night
Mostly clear, with a low around 34.
Saturday
Areas of frost before 7am. Otherwise, sunny, with a high near 62.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 70.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
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)
1:26 pm CDT Oct 13, 2026
2pm CDT Oct 13, 2026-6pm CDT Oct 19, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
