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.

Mostly Cloudy

74°F

23°C

Humidity 99%
Wind Speed SW 3 mph
Barometer 30.09 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Last update 8 Aug 6:55 am CDT
Extended Forecast for

Mason IL

  • Today

    Today: Sunny, with a high near 88. West southwest wind around 6 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 69. Light and variable wind.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 89. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 17 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 90. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Southwest wind 8 to 10 mph, with gusts as high as 16 mph.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers. Mostly sunny, with a high near 88.

    High: 88 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 88. West southwest wind around 6 mph.
Tonight
Mostly clear, with a low around 69. Light and variable wind.
Sunday
Sunny, with a high near 89. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 17 mph.
Sunday Night
Mostly clear, with a low around 73. South southwest wind 7 to 9 mph, with gusts as high as 16 mph.
Monday
Sunny, with a high near 90. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Monday Night
Mostly clear, with a low around 75. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday
Mostly sunny, with a high near 90. Southwest wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Wednesday
A 40 percent chance of showers. Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers and thunderstorms, then showers likely after 1am. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
Thursday
Showers likely. Partly sunny, with a high near 83.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 67.
Friday
A chance of showers and thunderstorms. 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:
1:41 am CDT Aug 8, 2026
Forecast Valid:
7am CDT Aug 8, 2026-6pm CDT Aug 14, 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