Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
83°F
28°C
| Humidity | 88% |
| Wind Speed | SE 6 mph |
| Barometer | 29.88 in (1011.3 mb) |
| Dewpoint | 79°F (26°C) |
| Visibility | 7.00 mi |
| Heat Index | 94°F (34°C) |
| Last update | 26 Jul 4:54 pm CDT |
Extended Forecast for
3 Miles W Decatur IL
Heat Advisory July 26, 05:54pm until July 27, 09:00pm
NOW until 9:00pm Mon

Heat Advisory
This Afternoon

High: 88 °F
Slight Chance
T-stormsTonight
Low: 75 °F
Slight Chance
T-storms then
Mostly CloudyMonday

High: 93 °F
Mostly Sunny
Monday Night

Low: 75 °F
Partly Cloudy
Tuesday

High: 87 °F
Mostly Sunny
Tuesday Night

Low: 64 °F
Mostly Clear
Wednesday

High: 84 °F
Sunny
Wednesday Night

Low: 63 °F
Clear
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. Heat index values as high as 103. West southwest wind around 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. South wind 3 to 5 mph.
Monday
Mostly sunny, with a high near 93. Heat index values as high as 109. South wind 6 to 13 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 75. South southwest wind 8 to 11 mph becoming north northwest after midnight. Winds could gust as high as 17 mph.
Tuesday
Mostly sunny, with a high near 87. North wind 9 to 13 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 64. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 84. North northeast wind 5 to 8 mph.
Wednesday Night
Clear, with a low around 63.
Thursday
Sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 67.
Friday
A chance of showers. Partly sunny, with a high near 84.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67.
Saturday
A chance of showers. Mostly sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Sunny, with a high near 85.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles W Decatur IL
39.84°N 89°W (Elev. 600 ft)
39.84°N 89°W (Elev. 600 ft)
5:26 pm CDT Jul 26, 2026
5pm CDT Jul 26, 2026-6pm CDT Aug 2, 2026



