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

59°F

15°C

Humidity 31%
Wind Speed S 9 mph
Barometer 30.24 in (1024.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 20 Apr 4:54 pm CDT
Extended Forecast for

3 Miles W Arthur IL

  • Tonight

    Tonight: Mostly clear, with a low around 47. South wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Breezy, with a southwest wind 11 to 21 mph, with gusts as high as 31 mph.

    High: 77 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. Southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    Low: 58 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. West southwest wind around 11 mph, with gusts as high as 16 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. South wind around 8 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 80 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 1am. Partly cloudy, with a low around 61. South wind around 16 mph, with gusts as high as 26 mph.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 47. South wind 6 to 11 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 77. Breezy, with a southwest wind 11 to 21 mph, with gusts as high as 31 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. Southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Wednesday
Mostly sunny, with a high near 76. West southwest wind around 11 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 56. South wind around 8 mph.
Thursday
Sunny, with a high near 80. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday Night
A 50 percent chance of showers after 1am. Partly cloudy, with a low around 61. South wind around 16 mph, with gusts as high as 26 mph.
Friday
Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Partly sunny, with a high near 71.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 51.
Monday
A chance of showers. Mostly cloudy, with a high near 70.
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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:
2:56 pm CDT Apr 20, 2026
Forecast Valid:
5pm CDT Apr 20, 2026-6pm CDT Apr 27, 2026
 
Forecast Discussion
 
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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