Mason, Illinois Weather
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Weather Forecast for Mason, Illinois : Union County
Issued: 2:18 am CDT Jun 4, 2025 Latitude: 37.5236608 Longitude: -89.2542515 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
30% chance of thunderstorms on Today 70% chance of thunderstorms on Tonight 70% chance of thunderstorms on Thursday 80% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 10% chance of rain on Sunday 20% chance of on Monday Sunny on Tuesday
High: 85°F Low: 69°F High: 82°F High: 81°F High: 81°F High: 83°F High: 82°F High: 81°F
Low: 69°F Low: 67°F Low: 62°F Low: 65°F Low: 62°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Rain Partly Sunny Sunny
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Current Conditions at
CARBONDALE - (KMDH)
75°
Clear
as of 4:52 AM CDST
Rel. Humidity: 64%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
14 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
70°
Clear
as of 5:15 AM CDST
Rel. Humidity: 73%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
3 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
CAPE GIRARDEAU - (KCGI)
72°
Clear
as of 4:53 AM CDST
Rel. Humidity: 73%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
8 MPH
180° South
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
73°
Clear
as of 5:15 AM CDST
Rel. Humidity: 73%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
6 MPH
170° South
Cloud Level(s): Clear
30% chance of thunderstorms Today Today... A chance of showers and thunderstorms. Mostly cloudy, with a high near 85. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
70% chance of thunderstorms Tonight Tonight... A chance of showers before 7pm, then showers and thunderstorms likely between 7pm and 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 69. South southeast wind 3 to 5 mph. Chance of precipitation is 70%.
70% chance of thunderstorms Thursday Thursday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Light and variable wind becoming west southwest around 6 mph. Chance of precipitation is 70%.
30% chance of thunderstorms Thursday Night Thursday Night... A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. Calm wind.
80% chance of thunderstorms Friday Friday... Showers likely, then showers and possibly a thunderstorm after 10am. High near 81. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 80%.
50% chance of thunderstorms Friday Night Friday Night... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. West wind 3 to 5 mph.
30% chance of thunderstorms Saturday Saturday... A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 81. Northwest wind 3 to 6 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 62. Light north wind.
10% chance of rain Sunday Sunday... A slight chance of showers. Mostly sunny, with a high near 83. Calm wind becoming south southwest around 5 mph in the afternoon.
10% chance of thunderstorms Sunday Night Sunday Night... A slight chance of showers and thunderstorms. Mostly clear, with a low around 65. Light west southwest wind.
20% chance of Monday Monday... A chance of showers. Partly sunny, with a high near 82. West wind 3 to 7 mph.
10% chance of thunderstorms Monday Night Monday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 62. Light west northwest wind.
Sunny on Tuesday Tuesday... Sunny, with a high near 81. Northwest wind 3 to 6 mph.
Current Radar Image


Sun Almanac for Mason, Illinois
Sunrise: 05:36 AM
Sunset: 8:15 PM
Civil Sunrise:05:06 AM
Civil Sunset: 8:45 PM
Nautical Sunrise: 04:27 AM
Nautical Sunset: 9:24 PM
Astro Sunrise: 03:44 AM
Astro Sunset: 10:06 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.