National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Overcast

78°F

26°C

Humidity 99%
Wind Speed N 6 mph
Barometer 29.99 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 14 Aug 4:35 am CDT
Extended Forecast for

Oconee IL

Heat Advisory August 14, 04:48am until August 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 14, 04:48am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • Overnight

    Low: 73 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 92. Heat index values as high as 107. East wind 5 to 7 mph becoming south in the afternoon.

    High: 92 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms between 3am and 4am. Mostly clear, with a low around 74. East wind 3 to 6 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 94. Heat index values as high as 109. East southeast wind 7 to 9 mph becoming west southwest in the morning. Winds could gust as high as 15 mph.

    High: 94 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. Southwest wind 3 to 6 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 92. West wind 5 to 8 mph.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69. North wind 3 to 6 mph.

    Low: 69 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Overnight
A 10 percent chance of showers after 5am. Partly cloudy, with a low around 73. South wind around 6 mph.
Friday
A 50 percent chance of showers and thunderstorms, mainly before 9am. Partly sunny, with a high near 92. Heat index values as high as 107. East wind 5 to 7 mph becoming south in the afternoon.
Friday Night
A slight chance of showers and thunderstorms between 3am and 4am. Mostly clear, with a low around 74. East wind 3 to 6 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 94. Heat index values as high as 109. East southeast wind 7 to 9 mph becoming west southwest in the morning. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 74. Southwest wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 92. West wind 5 to 8 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69. North wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Oconee IL
 39.29°N 89.12°W (Elev. 686 ft)
Last Update:
4:36 am CDT Aug 14, 2026
Forecast Valid:
4am CDT Aug 14, 2026-6pm CDT Aug 20, 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