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

81°F

27°C

Humidity 81%
Wind Speed SW 6 mph
Barometer 29.93 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Aug 4:35 pm CDT
Extended Forecast for

Altamont IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. West southwest wind around 5 mph.

    High: 81 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Chance
    T-storms and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming north northeast around 5 mph in the morning.

    High: 82 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 62. Light northeast wind.

    Low: 62 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 84. Calm wind becoming northwest 5 to 8 mph in the morning. Winds could gust as high as 15 mph.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. West southwest wind around 5 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 67. Calm wind.
Thursday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming north northeast around 5 mph in the morning.
Thursday Night
Partly cloudy, with a low around 62. Light northeast wind.
Friday
Sunny, with a high near 84. Light and variable wind.
Friday Night
Mostly clear, with a low around 64. Calm wind.
Saturday
Mostly sunny, with a high near 84. Calm wind becoming northwest 5 to 8 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.06°N 88.73°W (Elev. 600 ft)
Last Update:
4:36 pm CDT Aug 19, 2026
Forecast Valid:
4pm CDT Aug 19, 2026-6pm CDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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