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

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Partly Cloudy

68°F

20°C

Humidity 87%
Wind Speed S 17 G 24 mph
Barometer 29.97 in (1014.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 19 May 6:54 am CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 79. South southwest wind 13 to 16 mph, with gusts as high as 29 mph.

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 7pm, then a chance of showers after 2am. Mostly cloudy, with a low around 53. Northwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 53 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 10 percent chance of showers before 7am. Partly sunny, with a high near 67. North northeast wind 11 to 13 mph, with gusts as high as 20 mph.

    High: 67 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. Northeast wind 11 to 15 mph, with gusts as high as 21 mph.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 69. East wind 13 to 16 mph, with gusts as high as 22 mph.

    High: 69 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 52. East wind around 15 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 68. East northeast wind 11 to 16 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 76.

    High: 76 °F

    Mostly Cloudy

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 79. South southwest wind 13 to 16 mph, with gusts as high as 29 mph.
Tonight
A slight chance of showers and thunderstorms before 7pm, then a chance of showers after 2am. Mostly cloudy, with a low around 53. Northwest wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Wednesday
A 10 percent chance of showers before 7am. Partly sunny, with a high near 67. North northeast wind 11 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 45. Northeast wind 11 to 15 mph, with gusts as high as 21 mph.
Thursday
Partly sunny, with a high near 69. East wind 13 to 16 mph, with gusts as high as 22 mph.
Thursday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 52. East wind around 15 mph, with gusts as high as 20 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 68. East northeast wind 11 to 16 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55.
Saturday
Mostly cloudy, with a high near 76.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
Partly sunny, with a high near 80.
Sunday Night
Mostly cloudy, with a low around 61.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
4:36 am CDT May 19, 2026
Forecast Valid:
8am CDT May 19, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation