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.

Fair

62°F

17°C

Humidity 48%
Wind Speed S 16 G 25 mph
Barometer 30.10 in (1019.3 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 8 Apr 9:54 pm CDT
Extended Forecast for

2 Miles ENE Harristown IL

  • Tonight

    Tonight: Partly cloudy, with a low around 54. South wind around 15 mph, with gusts as high as 28 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76. Southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 76 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 56. South wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Showers. High near 65. Southwest wind 10 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. East northeast wind around 9 mph, with gusts as high as 15 mph.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66. East southeast wind around 10 mph, with gusts as high as 16 mph.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57. East southeast wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 78. Breezy.

    High: 78 °F

    Mostly Cloudy
    and Breezy

  • Sunday Night

    Sunday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 64. Breezy. Chance of precipitation is 60%.

    Low: 64 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 54. South wind around 15 mph, with gusts as high as 28 mph.
Thursday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 76. Southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 56. South wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Friday
Showers. High near 65. Southwest wind 10 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Mostly cloudy, with a low around 43. East northeast wind around 9 mph, with gusts as high as 15 mph.
Saturday
Partly sunny, with a high near 66. East southeast wind around 10 mph, with gusts as high as 16 mph.
Saturday Night
Mostly cloudy, with a low around 57. East southeast wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday
Mostly cloudy, with a high near 78. Breezy.
Sunday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 64. Breezy. Chance of precipitation is 60%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Breezy. Chance of precipitation is 50%.
Monday Night
Showers likely. Mostly cloudy, with a low around 65. Breezy.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Breezy.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 53.
Wednesday
A chance of showers. Partly sunny, with a high near 65.
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:
9:37 pm CDT Apr 8, 2026
Forecast Valid:
10pm CDT Apr 8, 2026-6pm CDT Apr 15, 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