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.

Fair

74°F

23°C

Humidity 89%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 2 Sep 2:15 am CDT
Extended Forecast for

Altamont IL

Heat Advisory September 2, 02:31am until September 4, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 02:31am until September 4, 07:00pm

    NOW until 7:00pm Fri

    Heat Advisory

  • Overnight

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 102. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Heat index values as high as 102. Southwest wind 5 to 8 mph.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Light south southwest wind.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 97. Calm wind becoming west southwest around 5 mph.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 95.

    High: 95 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 75. South southwest wind 3 to 5 mph.
Wednesday
Sunny and hot, with a high near 97. Heat index values as high as 102. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 76. South wind 3 to 5 mph.
Thursday
Sunny and hot, with a high near 98. Heat index values as high as 102. Southwest wind 5 to 8 mph.
Thursday Night
Mostly clear, with a low around 76. Light south southwest wind.
Friday
Sunny and hot, with a high near 97. Calm wind becoming west southwest around 5 mph.
Friday Night
Mostly clear, with a low around 74. Calm wind.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 95.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 67.
Labor Day
Sunny, with a high near 90.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.06°N 88.76°W (Elev. 636 ft)
Last Update:
2:27 am CDT Sep 2, 2026
Forecast Valid:
2am CDT Sep 2, 2026-6pm CDT Sep 8, 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