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

43°F

6°C

Humidity 84%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 18 Apr 9:55 pm CDT
Extended Forecast for

4 Miles WNW Altamont IL

  • Tonight

    Tonight: Areas of frost after 3am. Otherwise, clear, with a low around 35. Southwest wind 3 to 7 mph.

    Low: 35 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 7am. Otherwise, increasing clouds, with a high near 62. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 62 °F

    Areas Frost
    then
    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 35. North wind 5 to 9 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 60. Light and variable wind becoming east around 5 mph in the afternoon.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. Southeast wind 5 to 9 mph.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Areas of frost after 3am. Otherwise, clear, with a low around 35. Southwest wind 3 to 7 mph.
Sunday
Areas of frost before 7am. Otherwise, increasing clouds, with a high near 62. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 35. North wind 5 to 9 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.
Monday
Sunny, with a high near 60. Light and variable wind becoming east around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 46. Southeast wind 5 to 9 mph.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 73. Chance of precipitation is 70%.
Friday Night
Showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Altamont IL
 39.08°N 88.81°W (Elev. 633 ft)
Last Update:
5:56 pm CDT Apr 18, 2026
Forecast Valid:
10pm CDT Apr 18, 2026-6pm CDT Apr 25, 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