Mason, IL Weather - Forecast & Monthly Averages

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TEMPERATURE	63
HUMIDITY	77
PRESSURE	101625.52
WIND COND.	170 9.3

Weather Quick Facts

The highest monthly average temperature in Mason for August is 75.9 degrees
The lowest monthly average temperature in Mason for January is 29.5 degrees
The most monthly precipitation in Mason occurs in November with 11.8 inches
The air quality index in Mason is 5% better than the national average
The pollution index in Mason is 65% better than the national average

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Mason Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	22°F	38°F	30°F	1.7"
February	25°F	40°F	32°F	2.3"
March	36°F	54°F	44°F	1.1"
April	46°F	67°F	55°F	4.3"
May	55°F	76°F	64°F	0.0"
June	66°F	86°F	75°F	3.0"
July	66°F	86°F	75°F	7.9"
August	66°F	87°F	76°F	4.8"
September	59°F	81°F	69°F	8.6"
October	47°F	69°F	57°F	1.4"
November	36°F	56°F	46°F	11.8"
December	25°F	38°F	31°F	7.1"

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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.
Index	Mason	Illinois	National
Air quality index	40	41	42
Pollution index	959,673	3,148,694	2,726,193

Mason air quality

Measurement	Total
Days measured	245
Days with good air quality	224
Days with moderate air quality	21
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.040%
Carbon Tetrachloride	0.000%
Lead	0.000%
Mercury	0.002%

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	Population	Air Quality Index	National Avg.
Kinmundy, IL	942	40	20.0%
St. Elmo, IL	1,505	40	20.0%
Dieterich, IL	755	40	20.0%
Louisville, IL	1,143	40	20.0%
St. Peter, IL	456	40	20.0%
Mason, IL	249	40	20.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Hickory Ridge, AR	249	45	10.0%
East Globe, AZ	249	60	20.0%
Lanare, CA	249	56	12.0%
Larkspur, CO	249	45	10.0%
Yeehaw Junction, FL	249	36	28.0%
Mason, IL	249	40	20.0%

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.