National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

A Few Clouds

65°F

18°C

Humidity 78%
Wind Speed SW 13 G 23 mph
Barometer 29.68 in (1004.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 15 Nov 9:54 am CST
Extended Forecast for

3 Miles WSW Forsyth IL

  • Today

    Today: Sunny, with a high near 75. West southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 37. North northwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 54. Northwest wind 7 to 10 mph, with gusts as high as 16 mph.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30. Northwest wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 54. Light and variable wind becoming east southeast 5 to 10 mph in the morning.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Rain. Low around 41. East southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain before noon. Mostly cloudy, with a high near 55. East southeast wind 11 to 15 mph, with gusts as high as 20 mph.

    High: 55 °F

    Chance Rain
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 75. West southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 29 mph.
Tonight
Clear, with a low around 37. North northwest wind 9 to 14 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 54. Northwest wind 7 to 10 mph, with gusts as high as 16 mph.
Sunday Night
Mostly clear, with a low around 30. Northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 54. Light and variable wind becoming east southeast 5 to 10 mph in the morning.
Monday Night
Rain. Low around 41. East southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 55. East southeast wind 11 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 56.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 43.
Thursday
Rain. Mostly cloudy, with a high near 59.
Thursday Night
Rain likely. Mostly cloudy, with a low around 46.
Friday
A chance of rain. Mostly cloudy, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
9:36 am CST Nov 15, 2025
Forecast Valid:
10am CST Nov 15, 2025-6pm CST Nov 21, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation