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

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

55°F

13°C

Humidity 51%
Wind Speed N 15 G 22 mph
Barometer 29.88 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 10 Feb 12:54 pm CST
Extended Forecast for

2 Miles ENE Harristown IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 56. North northwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 56 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 26. North northwest wind 8 to 10 mph, with gusts as high as 16 mph.

    Low: 26 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 44. Northwest wind 8 to 10 mph, with gusts as high as 17 mph.

    High: 44 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 28. West northwest wind around 6 mph becoming calm in the evening.

    Low: 28 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Cloudy, with a high near 44. Calm wind becoming south southeast around 6 mph in the morning.

    High: 44 °F

    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28. Southeast wind around 6 mph.

    Low: 28 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 48. South wind 5 to 7 mph.

    High: 48 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 56. North northwest wind 10 to 15 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 26. North northwest wind 8 to 10 mph, with gusts as high as 16 mph.
Wednesday
Sunny, with a high near 44. Northwest wind 8 to 10 mph, with gusts as high as 17 mph.
Wednesday Night
Increasing clouds, with a low around 28. West northwest wind around 6 mph becoming calm in the evening.
Thursday
Cloudy, with a high near 44. Calm wind becoming south southeast around 6 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 28. Southeast wind around 6 mph.
Friday
Mostly sunny, with a high near 48. South wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around 32.
Saturday
Mostly cloudy, with a high near 50.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 36.
Sunday
A chance of rain. Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 32.
Washington's Birthday
Mostly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
Last Update:
12:36 pm CST Feb 10, 2026
Forecast Valid:
1pm CST Feb 10, 2026-6pm CST Feb 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation