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/Mist

74°F

23°C

Humidity 100%
Wind Speed E 3 mph
Barometer 29.95 in
Dewpoint 74°F (23°C)
Visibility 2.50 mi
Last update 27 Jun 9:15 am CDT
Extended Forecast for

Altamont IL

  • Today

    Today: A slight chance of showers, with thunderstorms also possible after 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 82. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after midnight. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%.

    Low: 70 °F

    Scattered
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: Isolated showers and thunderstorms before 8am. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 102. Light south southeast wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 20%.

    High: 90 °F

    Isolated
    T-storms and
    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind 6 to 8 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South wind 5 to 9 mph, with gusts as high as 15 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. South southwest wind 3 to 7 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers, with thunderstorms also possible after 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 82. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Scattered showers and thunderstorms, mainly after midnight. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%.
Sunday
Isolated showers and thunderstorms before 8am. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 102. Light south southeast wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 72. South wind 6 to 8 mph.
Monday
Sunny, with a high near 93. South wind 6 to 10 mph, with gusts as high as 16 mph.
Monday Night
Mostly clear, with a low around 73. South wind 5 to 9 mph, with gusts as high as 15 mph.
Tuesday
Sunny, with a high near 93. South southwest wind 3 to 7 mph.
Tuesday Night
Clear, with a low around 73.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 73.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.06°N 88.76°W (Elev. 636 ft)
Last Update:
9:22 am CDT Jun 27, 2026
Forecast Valid:
9am CDT Jun 27, 2026-6pm CDT Jul 3, 2026
 
Forecast Discussion
 
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Additional Resources

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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