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.

Overcast

58°F

14°C

Humidity 78%
Wind Speed W 13 mph
Barometer 29.76 in (1007.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 4 Nov 11:54 am CST
Extended Forecast for

2 Miles WNW Harristown IL

  • This Afternoon

    This Afternoon: Patchy drizzle, mainly after 4pm. Mostly cloudy, with a high near 59. West southwest wind 11 to 16 mph, with gusts as high as 22 mph.

    High: 59 °F

    Patchy
    Drizzle

  • Tonight

    Tonight: Patchy drizzle before 10pm. Mostly cloudy, with a low around 46. Southwest wind 9 to 11 mph, with gusts as high as 17 mph.

    Low: 46 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 58. West southwest wind 10 to 16 mph, with gusts as high as 22 mph.

    High: 58 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. West wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 15 mph.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 51. North wind 9 to 14 mph, with gusts as high as 18 mph.

    High: 51 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33. North wind 5 to 10 mph becoming light north northwest after midnight.

    Low: 33 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 52. Northwest wind 3 to 7 mph.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
Patchy drizzle, mainly after 4pm. Mostly cloudy, with a high near 59. West southwest wind 11 to 16 mph, with gusts as high as 22 mph.
Tonight
Patchy drizzle before 10pm. Mostly cloudy, with a low around 46. Southwest wind 9 to 11 mph, with gusts as high as 17 mph.
Thursday
Partly sunny, with a high near 58. West southwest wind 10 to 16 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 41. West wind 7 to 10 mph becoming north after midnight. Winds could gust as high as 15 mph.
Friday
Partly sunny, with a high near 51. North wind 9 to 14 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 33. North wind 5 to 10 mph becoming light north northwest after midnight.
Saturday
Mostly sunny, with a high near 52. Northwest wind 3 to 7 mph.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Sunny, with a high near 58.
Sunday Night
Clear, with a low around 33.
Monday
Sunny, with a high near 63.
Monday Night
Clear, with a low around 38.
Tuesday
Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Harristown IL
 39.85°N 89.08°W (Elev. 653 ft)
Last Update:
11:21 am CST Nov 4, 2026
Forecast Valid:
12pm CST Nov 4, 2026-6pm CST Nov 10, 2026
 
Forecast Discussion
 
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Additional Resources

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