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.

Overcast

16°F

-9°C

Humidity 70%
Wind Speed W 15 mph
Barometer 30.47 in
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 23 Feb 2:55 am CST
Extended Forecast for

Altamont IL

  • Overnight

    Overnight: A chance of flurries before 4am. Mostly cloudy, with a low around 15. Wind chill values between -1 and 4. Northwest wind around 16 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Chance
    Flurries

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 31. Wind chill values between zero and 10. Northwest wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 31 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 18. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 18 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 44. Breezy, with a south wind 8 to 13 mph increasing to 18 to 23 mph in the morning. Winds could gust as high as 33 mph.

    High: 44 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 29. South southwest wind 6 to 14 mph becoming west northwest after midnight. Winds could gust as high as 26 mph.

    Low: 29 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. West northwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 48 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 32. Calm wind becoming east 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 32 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: A 50 percent chance of rain before noon. Partly sunny, with a high near 43.

    High: 43 °F

    Chance Rain
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of flurries before 4am. Mostly cloudy, with a low around 15. Wind chill values between -1 and 4. Northwest wind around 16 mph, with gusts as high as 26 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 31. Wind chill values between zero and 10. Northwest wind 9 to 16 mph, with gusts as high as 25 mph.
Monday Night
Increasing clouds, with a low around 18. Calm wind becoming south 5 to 7 mph after midnight.
Tuesday
Mostly cloudy, with a high near 44. Breezy, with a south wind 8 to 13 mph increasing to 18 to 23 mph in the morning. Winds could gust as high as 33 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 29. South southwest wind 6 to 14 mph becoming west northwest after midnight. Winds could gust as high as 26 mph.
Wednesday
Mostly sunny, with a high near 48. West northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 32. Calm wind becoming east 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 50 percent chance of rain before noon. Partly sunny, with a high near 43.
Thursday Night
Mostly clear, with a low around 26.
Friday
Sunny, with a high near 55.
Friday Night
Mostly clear, with a low around 35.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
A chance of rain. Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Altamont IL
 39.06°N 88.76°W (Elev. 636 ft)
Last Update:
2:52 am CST Feb 23, 2026
Forecast Valid:
3am CST Feb 23, 2026-6pm CST Mar 1, 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