Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
81°F
27°C
| Humidity | 88% |
| Wind Speed | S 9 mph |
| Barometer | 29.93 in (1012.9 mb) |
| Dewpoint | 77°F (25°C) |
| Visibility | 7.00 mi |
| Heat Index | 88°F (31°C) |
| Last update | 26 Jul 11:54 am CDT |
Extended Forecast for
Forsyth IL
Heat Advisory until July 27, 09:00pm
NOW until 9:00pm Mon

Heat Advisory
This Afternoon

High: 89 °F
Slight Chance
T-stormsTonight

Low: 75 °F
Mostly Cloudy
Monday

High: 92 °F
Mostly Sunny
Monday Night

Low: 74 °F
Mostly Clear
Tuesday

High: 87 °F
Sunny
Tuesday Night

Low: 64 °F
Mostly Clear
Wednesday

High: 84 °F
Sunny
Wednesday Night

Low: 62 °F
Clear
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89. Heat index values as high as 104. West southwest wind around 7 mph.
Tonight
Mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming light and variable.
Monday
Mostly sunny, with a high near 92. Heat index values as high as 107. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 74. South southwest wind 9 to 13 mph becoming west northwest after midnight. Winds could gust as high as 18 mph.
Tuesday
Sunny, with a high near 87. North wind 10 to 14 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 64. Northeast wind 6 to 11 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 84. North northeast wind 6 to 10 mph.
Wednesday Night
Clear, with a low around 62.
Thursday
Sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 65.
Friday
A chance of showers. Partly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 84.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Forsyth IL
39.93°N 88.96°W (Elev. 650 ft)
39.93°N 88.96°W (Elev. 650 ft)
12:36 pm CDT Jul 26, 2026
12pm CDT Jul 26, 2026-6pm CDT Aug 1, 2026



