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.

Fog/Mist

55°F

13°C

Humidity 96%
Wind Speed Calm
Barometer 29.99 in (1015.6 mb)
Dewpoint 54°F (12°C)
Visibility 1.50 mi
Last update 5 Mar 2:54 pm CST
Extended Forecast for

4 Miles N Forsyth IL

  • This Afternoon

    This Afternoon: Patchy fog before 3pm. Otherwise, mostly cloudy, with a high near 60. West southwest wind around 6 mph.

    High: 60 °F

    Patchy Fog

  • Tonight

    Tonight: A slight chance of showers between 1am and 3am, then a chance of showers and thunderstorms after 3am. Widespread fog, mainly between 9pm and 3am. Otherwise, mostly cloudy, with a low around 50. Light and variable wind becoming southeast 5 to 9 mph in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 50%.

    Low: 50 °F

    Fog then
    Chance
    Showers and
    Fog

  • Friday

    Friday: Showers and thunderstorms likely before 2pm, then a slight chance of showers between 2pm and 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Breezy, with a south wind 10 to 15 mph increasing to 17 to 22 mph in the morning. Winds could gust as high as 32 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers
    Likely and
    Patchy Fog

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm, mainly after midnight. Low around 59. Breezy, with a south wind 16 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Breezy.
    Partly Cloudy
    then Showers

  • Saturday

    Saturday: A 50 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 66. Breezy, with a south southwest wind 15 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 28 mph.

    High: 66 °F

    Breezy.
    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36. West northwest wind 6 to 13 mph, with gusts as high as 18 mph.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 62. Southwest wind 6 to 15 mph, with gusts as high as 21 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 74. Breezy.

    High: 74 °F

    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Patchy fog before 3pm. Otherwise, mostly cloudy, with a high near 60. West southwest wind around 6 mph.
Tonight
A slight chance of showers between 1am and 3am, then a chance of showers and thunderstorms after 3am. Widespread fog, mainly between 9pm and 3am. Otherwise, mostly cloudy, with a low around 50. Light and variable wind becoming southeast 5 to 9 mph in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 50%.
Friday
Showers and thunderstorms likely before 2pm, then a slight chance of showers between 2pm and 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Breezy, with a south wind 10 to 15 mph increasing to 17 to 22 mph in the morning. Winds could gust as high as 32 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm, mainly after midnight. Low around 59. Breezy, with a south wind 16 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 50 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 66. Breezy, with a south southwest wind 15 to 22 mph becoming west northwest in the afternoon. Winds could gust as high as 28 mph.
Saturday Night
Partly cloudy, with a low around 36. West northwest wind 6 to 13 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 62. Southwest wind 6 to 15 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 46.
Monday
Sunny, with a high near 74. Breezy.
Monday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 55.
Tuesday
Showers and possibly a thunderstorm. Partly sunny, with a high near 75. Breezy.
Tuesday Night
Showers. Mostly cloudy, with a low around 50. Breezy.
Wednesday
Showers likely. Mostly cloudy, with a high near 62. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
2:36 pm CST Mar 5, 2026
Forecast Valid:
2pm CST Mar 5, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation