St. Clair, MI Weather - Forecast & Monthly Averages

TEMPERATURE	12
HUMIDITY	72
PRESSURE	103050
WIND COND.	300 7.6

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Weather Quick Facts

The highest monthly average temperature in St. Clair for July is 70.9 degrees
The lowest monthly average temperature in St. Clair for February is 24.1 degrees
The most monthly precipitation in St. Clair occurs in July with 4 inches
The air quality index in St. Clair is 33% worse than the national average
The pollution index in St. Clair is 1007% worse 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	18°F	32°F	25°F	3.5"
February	16°F	32°F	24°F	2.2"
March	26°F	43°F	33°F	2.2"
April	36°F	57°F	45°F	2.8"
May	46°F	69°F	57°F	3.2"
June	56°F	77°F	66°F	3.6"
July	61°F	81°F	71°F	4.0"
August	60°F	80°F	69°F	3.3"
September	53°F	74°F	63°F	3.1"
October	43°F	62°F	52°F	2.5"
November	33°F	49°F	41°F	2.9"
December	24°F	37°F	30°F	3.0"

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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	Michigan	National
Air quality index	56	69	42
Pollution index	30,180,300	4,161,606	2,726,193

St. Clair air quality

Measurement	Total
Days measured	365
Days with good air quality	135
Days with moderate air quality	217
Days w/ poor A.Q. for sensitive groups	13
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.030%
Benzene	0.390%
Carbon Tetrachloride	0.080%
Lead	0.130%
Mercury	0.010%

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.
Port Huron, MI	28,918	56	12.0%
Algonac, MI	4,057	56	12.0%
Emmett, MI	256	56	12.0%
Marine City, MI	4,083	56	12.0%
Pearl Beach, MI	5,395	56	12.0%
St. Clair, MI	5,354	56	12.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Saint Marys, NB	5,353	n/a
Candlewick Lake, IL	5,351	42	16.0%
Tonganoxie, KS	5,357	47	6.0%
Macon, MO	5,357	38	24.0%
Toronto, OH	5,357	46	8.0%
St. Clair, MI	5,354	56	12.0%

Source: The St. Clair, MI 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.