National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Partly Cloudy

67°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 20 Aug 5:35 am CDT
Extended Forecast for

Mason IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 83 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 63. Light north northeast wind.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. Light north wind.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers after 1am. Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear
    then Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 84. Light west wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 15 mph.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. North northwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82. North northwest wind 3 to 7 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming north northeast 5 to 7 mph in the morning.
Tonight
Mostly clear, with a low around 63. Light north northeast wind.
Friday
Sunny, with a high near 84. Light north wind.
Friday Night
A 40 percent chance of showers after 1am. Mostly clear, with a low around 66. Calm wind.
Saturday
Sunny, with a high near 84. Light west wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 62. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 82. North northwest wind 3 to 7 mph.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mason IL
 38.94°N 88.62°W (Elev. 564 ft)
Last Update:
4:36 am CDT Aug 20, 2026
Forecast Valid:
5am CDT Aug 20, 2026-6pm CDT Aug 26, 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