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.

Fog

71°F

22°C

Humidity 96%
Wind Speed Calm
Barometer 30.05 in (1017.2 mb)
Dewpoint 70°F (21°C)
Visibility 0.50 mi
Last update 14 Jul 1:54 am CDT
Extended Forecast for

3 Miles W Arthur IL

Dense Fog Advisory until July 14, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until July 14, 10:00am

    NOW until 10:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 68 °F

    Areas Dense
    Fog

  • Monday

    Monday: Areas of dense fog before 10am. Otherwise, mostly sunny, with a high near 86. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 86 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70. Light east wind.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. South southeast wind 3 to 7 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 70. South wind 3 to 6 mph.

    Low: 70 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Southwest wind 6 to 9 mph.

    High: 89 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72. South southwest wind around 7 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.

    High: 89 °F

    Mostly Sunny
    then Showers
    Likely

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, mostly cloudy, with a low around 68. Calm wind.
Monday
Areas of dense fog before 10am. Otherwise, mostly sunny, with a high near 86. Calm wind becoming east northeast around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 70. Light east wind.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. South southeast wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 70. South wind 3 to 6 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Southwest wind 6 to 9 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72. South southwest wind around 7 mph.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 70.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 68.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Arthur IL
 39.72°N 88.52°W (Elev. 682 ft)
Last Update:
1:56 am CDT Jul 14, 2025
Forecast Valid:
2am CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
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