Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
61°F
16°C
| Humidity | 78% |
| Wind Speed | S 10 mph |
| Barometer | 30.10 in (1019.2 mb) |
| Dewpoint | 54°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 12 Apr 2:54 am CDT |
Extended Forecast for
Decatur IL
Overnight

Low: 58 °F
Mostly Cloudy
Sunday
High: 80 °F
Partly Sunny
then Slight
Chance
Showers and
BreezySunday Night

Low: 62 °F
Showers
Likely and
BreezyMonday
High: 81 °F
Chance
Showers then
Partly SunnyMonday Night

Low: 67 °F
Mostly Cloudy
Tuesday

High: 83 °F
Chance
T-stormsTuesday Night
Low: 66 °F
T-storms
Likely then
Showers
LikelyWednesday

High: 78 °F
Showers
Wednesday Night

Low: 62 °F
Showers
Likely
Detailed Forecast
Overnight
Mostly cloudy, with a low around 58. South wind 11 to 13 mph, with gusts as high as 21 mph.
Sunday
A 10 percent chance of showers after 5pm. Increasing clouds, with a high near 80. Breezy, with a south southwest wind 14 to 22 mph, with gusts as high as 37 mph.
Sunday Night
Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Cloudy, with a low around 62. Breezy, with a south wind 13 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A 30 percent chance of showers before 7am. Mostly cloudy, with a high near 81. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Monday Night
Mostly cloudy, with a low around 67. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.
Tuesday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 83. Southwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Tuesday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 66. South southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 1pm. High near 78. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 59.
Friday
A chance of showers. Mostly sunny, with a high near 84.
Friday Night
Showers likely. Mostly cloudy, with a low around 61.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 76.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.84°N 88.94°W (Elev. 692 ft)
39.84°N 88.94°W (Elev. 692 ft)
1:16 am CDT Apr 12, 2026
3am CDT Apr 12, 2026-6pm CDT Apr 18, 2026



