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.

Partly Cloudy

74°F

23°C

Humidity 99%
Wind Speed E 5 mph
Barometer 30.07 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Last update 15 Aug 4:35 am CDT
Extended Forecast for

Effingham IL

Heat Advisory August 15, 04:52am until August 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 15, 04:52am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • Today

    High: 90 °F

    Chance
    T-storms then
    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 74. South wind 3 to 5 mph.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 90. Heat index values as high as 102. West northwest wind 6 to 8 mph.

    High: 90 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 70. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 84. North wind 3 to 6 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 86. Calm wind.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly between 8am and 11am. Partly sunny, with a high near 90. Heat index values as high as 102. South southeast wind 5 to 7 mph becoming northwest in the morning.
Tonight
Partly cloudy, with a low around 74. South wind 3 to 5 mph.
Sunday
A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 90. Heat index values as high as 102. West northwest wind 6 to 8 mph.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 70. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 84. North wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 64. Calm wind.
Tuesday
Sunny, with a high near 86. Calm wind.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Partly sunny, with a high near 87.
Wednesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Effingham IL
 39.12°N 88.55°W (Elev. 581 ft)
Last Update:
4:36 am CDT Aug 15, 2026
Forecast Valid:
4am CDT Aug 15, 2026-6pm CDT Aug 21, 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