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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

41°F

5°C

Humidity 82%
Wind Speed NW 17 G 24 mph
Barometer 29.88 in (1012.0 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 11 Mar 1:54 pm CDT
Extended Forecast for

Harristown IL

  • This Afternoon

    This Afternoon: Rain likely, mainly before 3pm. Cloudy, with a steady temperature around 41. Breezy, with a northwest wind around 22 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 41 °F

    Rain Likely
    and Breezy

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 29. Blustery, with a north northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.

    Low: 29 °F

    Gradual
    Clearing and
    Blustery then
    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 50. West wind 6 to 14 mph, with gusts as high as 18 mph.

    High: 50 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy, with a south wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 36 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 54. Breezy, with a west wind 18 to 23 mph, with gusts as high as 32 mph.

    High: 54 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 33. West northwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.

    Low: 33 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 53. East southeast wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 53 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 45.

    Low: 45 °F

    Cloudy

  • Sunday

    Sunday: Rain. High near 61. Breezy. Chance of precipitation is 90%.

    High: 61 °F

    Breezy. Rain
    Likely then
    Rain

Detailed Forecast

This Afternoon
Rain likely, mainly before 3pm. Cloudy, with a steady temperature around 41. Breezy, with a northwest wind around 22 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 29. Blustery, with a north northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.
Thursday
Increasing clouds, with a high near 50. West wind 6 to 14 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 36 mph.
Friday
Mostly sunny, with a high near 54. Breezy, with a west wind 18 to 23 mph, with gusts as high as 32 mph.
Friday Night
Mostly cloudy, with a low around 33. West northwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly cloudy, with a high near 53. East southeast wind 8 to 13 mph, with gusts as high as 18 mph.
Saturday Night
Cloudy, with a low around 45.
Sunday
Rain. High near 61. Breezy. Chance of precipitation is 90%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 30. Blustery.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Mostly sunny, with a high near 35.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harristown IL
 39.82°N 89.06°W (Elev. 600 ft)
Last Update:
1:26 pm CDT Mar 11, 2026
Forecast Valid:
2pm CDT Mar 11, 2026-6pm CDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation