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

57°F

14°C

Humidity 73%
Wind Speed W 6 mph
Barometer 29.99 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 13 May 6:35 am CDT
Extended Forecast for

Mason IL

  • Today

    Today: Sunny, with a high near 70. Northwest wind 7 to 17 mph, with gusts as high as 21 mph.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 44. North northwest wind 5 to 10 mph becoming light north in the evening. Winds could gust as high as 18 mph.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71. Light and variable wind.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 52. Calm wind becoming south southeast 5 to 8 mph in the evening. Winds could gust as high as 16 mph.

    Low: 52 °F

    Increasing
    Clouds

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 78. South southeast wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 78 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. South wind around 8 mph, with gusts as high as 16 mph.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South southwest wind 6 to 9 mph, with gusts as high as 15 mph.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 70. Northwest wind 7 to 17 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 44. North northwest wind 5 to 10 mph becoming light north in the evening. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 71. Light and variable wind.
Thursday Night
Increasing clouds, with a low around 52. Calm wind becoming south southeast 5 to 8 mph in the evening. Winds could gust as high as 16 mph.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 78. South southeast wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Friday Night
Partly cloudy, with a low around 63. South wind around 8 mph, with gusts as high as 16 mph.
Saturday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. South southwest wind 6 to 9 mph, with gusts as high as 15 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 68.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Breezy.
Monday Night
A chance of showers. Mostly cloudy, with a low around 70.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81.
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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:
6:36 am CDT May 13, 2026
Forecast Valid:
6am CDT May 13, 2026-6pm CDT May 19, 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