Mount Vernon, IL Weather - Forecast & Monthly Averages

TEMPERATURE	42
HUMIDITY	85
PRESSURE	100580
WIND COND.	300 20.5

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Weather Quick Facts

The highest monthly average temperature in Mount Vernon for July is 76.7 degrees
The lowest monthly average temperature in Mount Vernon for January is 31.8 degrees
The most monthly precipitation in Mount Vernon occurs in August with 11 inches
The air quality index in Mount Vernon is 2% worse than the national average
The pollution index in Mount Vernon is 79% better than the national average

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Mount Vernon 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	23°F	42°F	32°F	3.7"
February	25°F	44°F	34°F	3.5"
March	37°F	58°F	46°F	5.2"
April	46°F	70°F	57°F	8.7"
May	54°F	77°F	65°F	6.1"
June	63°F	87°F	74°F	8.3"
July	66°F	89°F	77°F	8.1"
August	64°F	88°F	75°F	11.0"
September	57°F	81°F	68°F	5.5"
October	45°F	70°F	56°F	5.6"
November	34°F	56°F	44°F	7.5"
December	28°F	45°F	36°F	6.9"

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Mount Vernon 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	Mount Vernon	Illinois	National
Air quality index	43	41	42
Pollution index	569,178	3,148,694	2,726,193

Mount Vernon air quality

Measurement	Total
Days measured	344
Days with good air quality	269
Days with moderate air quality	74
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.020%
Carbon Tetrachloride	0.000%
Lead	0.000%
Mercury	0.000%

Average monthly Mount Vernon temperature with heat index

Mount Vernon monthly precipitation with daily maximum

Mount Vernon monthly snow depth with daily maximum

Mount Vernon monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Keenes, IL	53	43	14.0%
Wamac, IL	1,222	43	14.0%
Ina, IL	2,243	43	14.0%
Waltonville, IL	413	43	14.0%
Ashley, IL	471	43	14.0%
Mount Vernon, IL	14,769	43	14.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Gloversville, NY	14,771	37	26.0%
South Farmingdale, NY	14,766	51	2.0%
Hobe Sound, FL	14,764	36	28.0%
Sterling, IL	14,774	42	16.0%
Whitewater, WI	14,762	37	26.0%
Mount Vernon, IL	14,769	43	14.0%

Source: The Mount Vernon, 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.