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.

Overcast

58°F

14°C

Humidity 78%
Wind Speed W 13 mph
Barometer 29.76 in (1007.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 4 Nov 11:54 am CST
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: Patchy drizzle, mainly after 5pm. Mostly cloudy, with a high near 60. West southwest wind 13 to 17 mph, with gusts as high as 22 mph.

    High: 60 °F

    Patchy
    Drizzle

  • Tonight

    Tonight: Patchy drizzle before 10pm. Mostly cloudy, with a low around 45. Southwest wind 9 to 13 mph, with gusts as high as 17 mph.

    Low: 45 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after 5pm. Mostly cloudy, with a high near 58. West southwest wind 11 to 17 mph, with gusts as high as 22 mph.

    High: 58 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. West wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 15 mph.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 51. North wind 9 to 15 mph, with gusts as high as 20 mph.

    High: 51 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. North wind 6 to 11 mph becoming light north northwest after midnight.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53. Northwest wind 3 to 7 mph.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

Detailed Forecast

This Afternoon
Patchy drizzle, mainly after 5pm. Mostly cloudy, with a high near 60. West southwest wind 13 to 17 mph, with gusts as high as 22 mph.
Tonight
Patchy drizzle before 10pm. Mostly cloudy, with a low around 45. Southwest wind 9 to 13 mph, with gusts as high as 17 mph.
Thursday
A 20 percent chance of rain after 5pm. Mostly cloudy, with a high near 58. West southwest wind 11 to 17 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 40. West wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 15 mph.
Friday
Partly sunny, with a high near 51. North wind 9 to 15 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 32. North wind 6 to 11 mph becoming light north northwest after midnight.
Saturday
Sunny, with a high near 53. Northwest wind 3 to 7 mph.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 32.
Monday
Sunny, with a high near 64.
Monday Night
Clear, with a low around 37.
Tuesday
Sunny, with a high near 66.
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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:
12:21 pm CST Nov 4, 2026
Forecast Valid:
12pm CST Nov 4, 2026-6pm CST Nov 10, 2026
 
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