Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
52°F
11°C
| Humidity | 66% |
| Wind Speed | NE 17 mph |
| Barometer | 30.21 in (1023.1 mb) |
| Dewpoint | 41°F (5°C) |
| Visibility | 10.00 mi |
| Wind Chill | 47°F (8°C) |
| Last update | 20 May 10:54 pm CDT |
Extended Forecast for
3 Miles WSW Forsyth IL
Overnight

Low: 47 °F
Partly Cloudy
Thursday

High: 69 °F
Mostly Sunny
Thursday Night

Low: 52 °F
Mostly Cloudy
Friday
High: 68 °F
Chance
Showers then
Showers
LikelyFriday Night

Low: 57 °F
Showers
LikelySaturday

High: 77 °F
Mostly Cloudy
Saturday Night
Low: 58 °F
Mostly Cloudy
then Chance
ShowersSunday

High: 78 °F
Chance
ShowersSunday Night

Low: 58 °F
Mostly Cloudy
Detailed Forecast
Overnight
Partly cloudy, with a low around 47. Northeast wind around 11 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 69. East wind 13 to 15 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 52. East wind around 13 mph, with gusts as high as 20 mph.
Friday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 68. East wind 13 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Showers likely before 1am. Mostly cloudy, with a low around 57. East northeast wind 7 to 11 mph becoming west southwest after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly cloudy, with a high near 77. West southwest wind 8 to 11 mph, with gusts as high as 15 mph.
Saturday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 58. Southwest wind around 6 mph becoming light and variable.
Sunday
A 30 percent chance of showers. Mostly cloudy, with a high near 78.
Sunday Night
Mostly cloudy, with a low around 58.
Memorial Day
Mostly cloudy, with a high near 79.
Monday Night
A chance of showers. Mostly cloudy, with a low around 61.
Tuesday
A chance of showers. Partly sunny, with a high near 81.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles WSW Forsyth IL
39.89°N 89.02°W (Elev. 656 ft)
39.89°N 89.02°W (Elev. 656 ft)
10:36 pm CDT May 20, 2026
12am CDT May 21, 2026-6pm CDT May 27, 2026


