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.

Fog

71°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 71°F (22°C)
Visibility 0.50 mi
Last update 28 Jun 3:35 am CDT
Extended Forecast for

Altamont IL

Heat Advisory June 29, 11:00am until July 3, 12:00am
Heat Advisory June 28, 01:00pm until June 28, 07:00pm
Dense Fog Advisory until June 28, 08:00am
Click here for hazard details and duration
Heat Advisory
Heat Advisory
Dense Fog Advisory
  •  
    Dense Fog Advisory until June 28, 08:00am

    NOW until 8:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 70 °F

    Chance
    T-storms and
    Areas Fog

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 102. Calm wind becoming south 5 to 7 mph in the morning.

    High: 89 °F

    Chance
    T-storms and
    Areas Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 93. Heat index values as high as 107. South southwest wind 5 to 10 mph, with gusts as high as 17 mph.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South wind 5 to 9 mph, with gusts as high as 16 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. South southwest wind 5 to 8 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. South wind 3 to 7 mph.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms. Areas of fog. Otherwise, mostly cloudy, with a low around 70. Calm wind.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 7am. Areas of fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 102. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 73. South wind around 6 mph.
Monday
Mostly sunny, with a high near 93. Heat index values as high as 107. South southwest wind 5 to 10 mph, with gusts as high as 17 mph.
Monday Night
Mostly clear, with a low around 73. South wind 5 to 9 mph, with gusts as high as 16 mph.
Tuesday
Sunny, with a high near 94. South southwest wind 5 to 8 mph.
Tuesday Night
Clear, with a low around 73. South wind 3 to 7 mph.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 73.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 72.
Independence Day
Sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.06°N 88.73°W (Elev. 600 ft)
Last Update:
2:36 am CDT Jun 28, 2026
Forecast Valid:
4am CDT Jun 28, 2026-6pm CDT Jul 4, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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