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.

Mostly Cloudy

60°F

16°C

Humidity 84%
Wind Speed SE 16 mph
Barometer 29.51 in (999.4 mb)
Dewpoint 55°F (13°C)
Visibility 8.00 mi
Last update 19 Feb 12:54 pm CST
Extended Forecast for

2 Miles ENE Harristown IL

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly between 2pm and 3pm. Mostly cloudy, with a high near 62. South southeast wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    T-storms
    Likely

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. Breezy, with a south wind 9 to 14 mph becoming west 19 to 24 mph after midnight. Winds could gust as high as 38 mph.

    Low: 35 °F

    Slight Chance
    T-storms then
    Partly Cloudy
    and Breezy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 44. Breezy, with a west wind 19 to 24 mph decreasing to 13 to 18 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 44 °F

    Decreasing
    Clouds and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. Northwest wind 6 to 10 mph, with gusts as high as 15 mph.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 41. West northwest wind 7 to 14 mph, with gusts as high as 18 mph.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 22. Northwest wind 10 to 16 mph, with gusts as high as 22 mph.

    Low: 22 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 34. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 31 mph.

    High: 34 °F

    Partly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly between 2pm and 3pm. Mostly cloudy, with a high near 62. South southeast wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 35. Breezy, with a south wind 9 to 14 mph becoming west 19 to 24 mph after midnight. Winds could gust as high as 38 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 44. Breezy, with a west wind 19 to 24 mph decreasing to 13 to 18 mph in the afternoon. Winds could gust as high as 37 mph.
Friday Night
Mostly clear, with a low around 25. Northwest wind 6 to 10 mph, with gusts as high as 15 mph.
Saturday
Mostly sunny, with a high near 41. West northwest wind 7 to 14 mph, with gusts as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 22. Northwest wind 10 to 16 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 34. Breezy, with a northwest wind 16 to 22 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 18.
Monday
Sunny, with a high near 34.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Mostly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Mostly cloudy, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
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:
12:26 pm CST Feb 19, 2026
Forecast Valid:
1pm CST Feb 19, 2026-6pm CST Feb 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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