National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Fair

39°F

4°C

Humidity 62%
Wind Speed S 6 mph
Barometer 30.15 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 12 Jan 9:15 pm CST
Extended Forecast for

Altamont IL

  • Tonight

    Tonight: Mostly clear, with a low around 34. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. Southwest wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 37. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 29 by 5pm. Breezy, with a north northwest wind 11 to 21 mph, with gusts as high as 31 mph.

    High: 38 °F⇓

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16. North northwest wind 10 to 16 mph, with gusts as high as 29 mph.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 28. Northwest wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 17 mph.

    High: 28 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21. South southwest wind 5 to 11 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 34. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Tuesday
Mostly sunny, with a high near 57. Southwest wind 9 to 16 mph, with gusts as high as 28 mph.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 37. West wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 29 by 5pm. Breezy, with a north northwest wind 11 to 21 mph, with gusts as high as 31 mph.
Wednesday Night
Partly cloudy, with a low around 16. North northwest wind 10 to 16 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 28. Northwest wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 17 mph.
Thursday Night
Mostly cloudy, with a low around 21. South southwest wind 5 to 11 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 39.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Mostly cloudy, with a high near 25.
Saturday Night
Mostly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 21.
Sunday Night
Partly cloudy, with a low around 10.
M.L.King Day
Mostly sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.04°N 88.76°W (Elev. 600 ft)
Last Update:
8:56 pm CST Jan 12, 2026
Forecast Valid:
9pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation