St. Clair, PA Weather - Forecast & Monthly Averages

TEMPERATURE	34
HUMIDITY	100
PRESSURE	100270.97
WIND COND.	330 7.4

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Weather Quick Facts

The highest monthly average temperature in St. Clair for July is 76.7 degrees
The lowest monthly average temperature in St. Clair for January is 31 degrees
The most monthly precipitation in St. Clair occurs in July with 5 inches
The air quality index in St. Clair is equal to the national average
The pollution index in St. Clair is 53% better than the national average

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St. Clair 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	40°F	31°F	2.6"
February	23°F	42°F	32°F	2.4"
March	31°F	53°F	41°F	3.1"
April	42°F	66°F	54°F	3.6"
May	51°F	75°F	63°F	3.7"
June	61°F	84°F	72°F	4.8"
July	66°F	88°F	77°F	5.0"
August	64°F	85°F	74°F	4.7"
September	57°F	79°F	68°F	4.4"
October	46°F	67°F	56°F	4.8"
November	35°F	55°F	45°F	2.7"
December	29°F	45°F	36°F	3.8"

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St. Clair 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	St. Clair	Pennsylvania	National
Air quality index	42	45	42
Pollution index	1,279,530	4,584,805	2,726,193

St. Clair air quality

Measurement	Total
Days measured	360
Days with good air quality	278
Days with moderate air quality	78
Days w/ poor A.Q. for sensitive groups	4
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.020%
Carbon Tetrachloride	0.002%
Lead	0.002%
Mercury	0.000%

Average monthly St. Clair temperature with heat index

St. Clair monthly precipitation with daily maximum

St. Clair monthly snow depth with daily maximum

St. Clair monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Nuremberg, PA	434	38	24.0%
Englewood, PA	698	42	16.0%
Heckscherville, PA	237	42	16.0%
Mechanicsville, PA	407	42	16.0%
Palo Alto, PA	889	42	16.0%
St. Clair, PA	2,842	42	16.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Ferris, TX	2,842	51	2.0%
Somerset, WI	2,842	46	8.0%
Woodbury, TN	2,841	25	50.0%
Ravensworth, VA	2,841	47	6.0%
Paden City, WV	2,841	39	22.0%
St. Clair, PA	2,842	42	16.0%

Source: The St. Clair, 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.