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

71°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 18 Aug 9:15 pm CDT
Extended Forecast for

Altamont IL

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 66. Light south wind.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly before noon. Mostly cloudy, with a high near 79. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Northeast wind 3 to 5 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 66. Light south wind.
Wednesday
Showers and thunderstorms likely, mainly before noon. Mostly cloudy, with a high near 79. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 81. Northeast wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 61. Calm wind.
Friday
Sunny, with a high near 83. Light and variable wind.
Friday Night
Mostly clear, with a low around 63. Calm wind.
Saturday
Sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 84.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.04°N 88.76°W (Elev. 600 ft)
Last Update:
7:36 pm CDT Aug 18, 2026
Forecast Valid:
9pm CDT Aug 18, 2026-6pm CDT Aug 25, 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