TODAY AUG21
TEMPERATURE72
HUMIDITY98
PRESSURE29.81
WIND COND.
  • 7655Wed
  • 7858Thu
  • 7867Fri30%
  • 8771Sat
  • 9071Sun
daynightWeather update from Effingham, Effingham County Memorial Airport at

Mason Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January22°F38°F30°F1.7"
February25°F40°F32°F2.3"
March36°F54°F44°F1.1"
April46°F67°F55°F4.3"
May55°F76°F64°F0.0"
June66°F86°F75°F3.0"
July66°F86°F75°F7.9"
August66°F87°F76°F4.8"
September59°F81°F69°F8.6"
October47°F69°F57°F1.4"
November36°F56°F46°F11.8"
December25°F38°F31°F7.1"

Did you know?

  • The highest monthly average temperature in Mason for August is 76 degrees.
  • The lowest monthly average temperature in Mason for January is 30 degrees.
  • The most monthly precipitation in Mason occurs in November with 11.8 inches.
  • The air quality index in Mason is 25% better than the national average.
  • The pollution index in Mason is 81% better than the national average.

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Compare Mason, IL Weather To Other Cities

Mason air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexMasonIllinoisNational
Air quality index374150
Pollution index959,6733,347,2955,066,862

Mason air quality information

MeasurementTotal
Days measured214
Days with good air quality201
Days with moderate air quality13
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Mason air quality information

PollutantTotal
Arsenic0.001%
Benzene0.040%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.002%

Average monthly Mason temperature with heat index

Mason monthly precipitation with daily maximum

Mason monthly snow depth with daily maximum

Mason monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Effingham, IL12,6503726%
Louisville, IL1,0843726%
St. Peter, IL3883726%
Altamont, IL2,3143726%
Farina, IL6473726%
Mason, IL3523726%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Scipio, UT352476%
Delaware, OK3523726%
Draper, VA3523530%
Midland, OH3523726%
Epworth, GA352198%
Mason, IL3523726%
Source: The Mason, IL weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.