Norristown, PA Weather - Forecast & Monthly Averages

TEMPERATURE	27
HUMIDITY	74
PRESSURE	101860
WIND COND.	310 13

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Weather Quick Facts

The highest monthly average temperature in Norristown for July is 75.8 degrees
The lowest monthly average temperature in Norristown for January is 32.9 degrees
The most monthly precipitation in Norristown occurs in August with 11 inches
The air quality index in Norristown is 21% worse than the national average
The pollution index in Norristown is 358% worse than the national average

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Norristown 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	26°F	41°F	33°F	3.2"
February	26°F	42°F	33°F	2.5"
March	34°F	53°F	42°F	6.9"
April	43°F	65°F	53°F	3.6"
May	52°F	74°F	63°F	6.0"
June	61°F	81°F	71°F	6.5"
July	66°F	86°F	76°F	7.9"
August	63°F	83°F	73°F	11.0"
September	56°F	77°F	66°F	6.8"
October	46°F	66°F	55°F	9.4"
November	37°F	55°F	45°F	2.9"
December	31°F	46°F	38°F	7.7"

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Norristown 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	Norristown	Pennsylvania	National
Air quality index	51	45	42
Pollution index	12,485,100	4,584,805	2,726,193

Norristown air quality

Measurement	Total
Days measured	365
Days with good air quality	180
Days with moderate air quality	169
Days w/ poor A.Q. for sensitive groups	16
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.020%
Benzene	0.100%
Carbon Tetrachloride	0.100%
Lead	0.120%
Mercury	0.010%

Average monthly Norristown temperature with heat index

Norristown monthly precipitation with daily maximum

Norristown monthly snow depth with daily maximum

Norristown monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Doylestown, PA	8,282	41	18.0%
Schwenksville, PA	1,431	42	16.0%
Green Lane, PA	409	42	16.0%
Woxall, PA	1,477	42	16.0%
Greenfields, PA	1,130	42	16.0%
Norristown, PA	34,392	51	2.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
University CDP (Orange County), FL	34,379	43	14.0%
Montgomery Village, MD	34,413	47	6.0%
Georgetown, KY	34,362	42	16.0%
University City, MO	34,336	54	8.0%
Socorro, TX	34,329	53	6.0%
Norristown, PA	34,392	51	2.0%

Source: The Norristown, PA 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.