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

25°F

-4°C

Humidity 83%
Wind Speed SE 5 mph
Barometer 30.42 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 12 Jan 2:35 am CST
Extended Forecast for

Mason IL

  • Overnight

    Overnight: Clear, with a low around 24. South wind 6 to 8 mph, with gusts as high as 15 mph.

    Low: 24 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 49. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 57. Southwest wind 9 to 17 mph, with gusts as high as 25 mph.

    High: 57 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 38. Southwest wind 8 to 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.

    Low: 38 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain showers after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 41. Northwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 17. North northwest wind 15 to 17 mph, with gusts as high as 29 mph.

    Low: 17 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 24. South wind 6 to 8 mph, with gusts as high as 15 mph.
Monday
Sunny, with a high near 49. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 33. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Tuesday
Increasing clouds, with a high near 57. Southwest wind 9 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 38. Southwest wind 8 to 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.
Wednesday
A chance of rain showers after noon, mixing with snow after 3pm. Mostly cloudy, with a high near 41. Northwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 17. North northwest wind 15 to 17 mph, with gusts as high as 29 mph.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 39.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Mostly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mason IL
 38.94°N 88.62°W (Elev. 564 ft)
Last Update:
2:37 am CST Jan 12, 2026
Forecast Valid:
2am CST Jan 12, 2026-6pm CST Jan 18, 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