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.

Fair

81°F

27°C

Humidity 56%
Wind Speed W 9 mph
Barometer 30.02 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 20 Jun 12:35 pm CDT
Extended Forecast for

Mason IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 83. West northwest wind around 6 mph.

    High: 83 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Light and variable wind.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after noon. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 82. East southeast wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 1am, then a chance of showers after 1am. Some of the storms could produce heavy rainfall. Low around 66. South wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 66 °F

    Heavy Rain
    then Showers
    Likely

  • Monday

    Monday: Mostly cloudy, with a high near 76. West wind 9 to 11 mph becoming north in the afternoon. Winds could gust as high as 17 mph.

    High: 76 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59. North wind 3 to 8 mph.

    Low: 59 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 79. North northeast wind around 5 mph becoming calm in the afternoon.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 83. West northwest wind around 6 mph.
Tonight
Partly cloudy, with a low around 64. Light and variable wind.
Sunday
Showers and thunderstorms likely, mainly after noon. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 82. East southeast wind 5 to 15 mph becoming south in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 1am, then a chance of showers after 1am. Some of the storms could produce heavy rainfall. Low around 66. South wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday
Mostly cloudy, with a high near 76. West wind 9 to 11 mph becoming north in the afternoon. Winds could gust as high as 17 mph.
Monday Night
Partly cloudy, with a low around 59. North wind 3 to 8 mph.
Tuesday
Sunny, with a high near 79. North northeast wind around 5 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 60.
Friday
A chance of showers. Mostly sunny, with a high near 80.
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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:
11:56 am CDT Jun 20, 2026
Forecast Valid:
12pm CDT Jun 20, 2026-6pm CDT Jun 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