Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Partly Cloudy

67°F

19°C

Humidity 87%
Wind Speed NA
Barometer 29.93 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 May 5:54 pm CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 4am.  Cloudy, then gradually becoming partly cloudy, with a low around 68. South wind 16 to 18 mph, with gusts as high as 28 mph.

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm.  High near 81. Breezy, with a south southwest wind 16 to 22 mph, with gusts as high as 30 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Breezy.
    Chance
    T-storms then
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers.  Cloudy, then gradually becoming partly cloudy, with a low around 54. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.  Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Partly sunny, with a high near 67. North northeast wind 11 to 14 mph, with gusts as high as 20 mph.

    High: 67 °F

    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: Mostly sunny, with a high near 69. East wind 13 to 15 mph, with gusts as high as 22 mph.

    High: 69 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am.  Mostly cloudy, with a low around 52. East wind 13 to 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 70. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers before 1am.  Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 68. South wind 16 to 18 mph, with gusts as high as 28 mph.
Tuesday
Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 81. Breezy, with a south southwest wind 16 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Cloudy, then gradually becoming partly cloudy, with a low around 54. Northwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 67. North northeast wind 11 to 14 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
Mostly sunny, with a high near 69. East wind 13 to 15 mph, with gusts as high as 22 mph.
Thursday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 52. East wind 13 to 15 mph, with gusts as high as 20 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 57.
Saturday
Mostly cloudy, with a high near 77.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 59.
Sunday
Partly sunny, with a high near 80.
Sunday Night
Mostly cloudy, with a low around 62.
Memorial Day
A chance of showers. Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
3:06 pm CDT May 18, 2026
6pm CDT May 18, 2026-6pm CDT May 25, 2026
 
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Additional Resources

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