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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

46°F

8°C

Humidity 79%
Wind Speed N 13 mph
Barometer 30.44 in (1030.9 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 17 Oct 12:54 am CDT
Extended Forecast for

Forsyth IL

  • Overnight

    Overnight: Mostly clear, with a low around 36. North wind 10 to 13 mph, with gusts as high as 18 mph.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy frost before 8am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.

    High: 59 °F

    Patchy Frost
    then Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 4am. Otherwise, clear, with a low around 34. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 66. South wind 6 to 11 mph, with gusts as high as 15 mph.

    High: 66 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 36. South southeast wind 3 to 6 mph.

    Low: 36 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. East wind around 5 mph becoming calm in the evening.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 36. North wind 10 to 13 mph, with gusts as high as 18 mph.
Saturday
Patchy frost before 8am. Otherwise, sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.
Saturday Night
Areas of frost after 4am. Otherwise, clear, with a low around 34. Calm wind becoming south southeast around 6 mph after midnight.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 66. South wind 6 to 11 mph, with gusts as high as 15 mph.
Sunday Night
Clear, with a low around 36. South southeast wind 3 to 6 mph.
Monday
Sunny, with a high near 73. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 39. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Clear, with a low around 45.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
12:41 am CDT Oct 17, 2026
Forecast Valid:
1am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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