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

78°F

26°C

Humidity 45%
Wind Speed N 10 mph
Barometer 30.05 in (1017.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 23 Aug 2:54 pm CDT
Extended Forecast for

3 Miles W Arthur IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. Northwest wind around 10 mph, with gusts as high as 16 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 55. North northwest wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 81. Light and variable wind.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. East northeast wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Southeast wind 3 to 5 mph.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63. South southeast wind around 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 86. Southwest wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers before 1am. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 80. Northwest wind around 10 mph, with gusts as high as 16 mph.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 55. North northwest wind around 6 mph becoming calm in the evening.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 81. Light and variable wind.
Monday Night
Mostly clear, with a low around 57. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 84. Southeast wind 3 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 63. South southeast wind around 5 mph.
Wednesday
Mostly sunny, with a high near 86. Southwest wind 5 to 9 mph, with gusts as high as 15 mph.
Wednesday Night
A 40 percent chance of showers before 1am. Partly cloudy, with a low around 65.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 62.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 63.
Saturday
Mostly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Arthur IL
 39.72°N 88.52°W (Elev. 682 ft)
Last Update:
3:36 pm CDT Aug 23, 2026
Forecast Valid:
3pm CDT Aug 23, 2026-6pm CDT Aug 29, 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