Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog/Mist

40°F

4°C

Humidity 97%
Wind Speed S 7 mph
Barometer 30.04 in (1017.6 mb)
Dewpoint 39°F (4°C)
Visibility 4.00 mi
Wind Chill35°F (2°C)
Last update 16 Feb 7:54 am CST
Extended Forecast for

2 Miles ENE Harristown IL

Dense Fog Advisory February 16, 08:26am until February 16, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory February 16, 08:26am until February 16, 09:00am

    NOW until 9:00am Mon

    Dense Fog Advisory

  • Washington's Birthday

    High: 61 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 41. South wind around 10 mph, with gusts as high as 18 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 59 °F

    Mostly Cloudy
    then Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain after midnight.  Cloudy, then gradually becoming partly cloudy, with a low around 55. Breezy, with a south wind 20 to 23 mph, with gusts as high as 32 mph.

    Low: 55 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Sunny, with a high near 67. Breezy, with a west southwest wind 11 to 21 mph, with gusts as high as 30 mph.

    High: 67 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. Southwest wind 7 to 9 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of rain after noon.  Mostly sunny, with a high near 67. South southeast wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 67 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain before midnight.  Partly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain
    then Mostly
    Clear

Detailed Forecast

Washington's Birthday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 61. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 41. South wind around 10 mph, with gusts as high as 18 mph.
Tuesday
Mostly cloudy, with a high near 59. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.
Tuesday Night
A 50 percent chance of rain after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 55. Breezy, with a south wind 20 to 23 mph, with gusts as high as 32 mph.
Wednesday
Sunny, with a high near 67. Breezy, with a west southwest wind 11 to 21 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 43. Southwest wind 7 to 9 mph becoming east southeast after midnight. Winds could gust as high as 15 mph.
Thursday
A 50 percent chance of rain after noon. Mostly sunny, with a high near 67. South southeast wind 8 to 15 mph, with gusts as high as 23 mph.
Thursday Night
A 40 percent chance of rain before midnight. Partly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Partly sunny, with a high near 44.
Saturday Night
A chance of rain. Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 37.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
7:31 am CST Feb 16, 2026
8am CST Feb 16, 2026-6pm CST Feb 22, 2026
 
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Additional Resources

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