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 47%
Wind Speed S 13 G 17 mph
Barometer 30.29 in
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 12 Jan 11:15 am CST
Extended Forecast for

Mason IL

  • Today

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

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 33. South southwest wind 7 to 9 mph, with gusts as high as 18 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 28 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 temperature rising to near 40 by 9am, then falling to around 32 during the remainder of the day. Northwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    High: 40 °F⇓

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 17. North northwest wind 15 to 17 mph, with gusts as high as 29 mph.

    Low: 17 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 29. North northwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 49. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 33. South southwest wind 7 to 9 mph, with gusts as high as 18 mph.
Tuesday
Increasing clouds, with a high near 57. Southwest wind 9 to 17 mph, with gusts as high as 28 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 temperature rising to near 40 by 9am, then falling to around 32 during the remainder of the day. Northwest wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, 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. North northwest wind 6 to 14 mph, with gusts as high as 21 mph.
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:
11:02 am CST Jan 12, 2026
Forecast Valid:
11am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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