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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.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January18°F32°F25°F3.5"
February16°F32°F24°F2.2"
March26°F43°F33°F2.2"
April36°F57°F45°F2.8"
May46°F69°F57°F3.2"
June56°F77°F66°F3.6"
July61°F81°F71°F4.0"
August60°F80°F69°F3.3"
September53°F74°F63°F3.1"
October43°F62°F52°F2.5"
November33°F49°F41°F2.9"
December24°F37°F30°F3.0"

Did you know?

  • The highest monthly average temperature in St. Clair for July is 71 degrees.
  • The lowest monthly average temperature in St. Clair for February is 24 degrees.
  • The most monthly precipitation in St. Clair occurs in July with 4 inches.
  • The air quality index in St. Clair is 4% worse than the national average.
  • The pollution index in St. Clair is 495% worse than the national average.

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Compare St. Clair, MI Weather To Other Cities

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.
IndexSt. ClairMichiganNational
Air quality index526950
Pollution index30,180,3004,018,8005,066,862

St. Clair air quality information

MeasurementTotal
Days measured365
Days with good air quality165
Days with moderate air quality193
Days w/ poor A.Q. for sensitive groups7
Days with unhealthy air quality

St. Clair air quality information

PollutantTotal
Arsenic0.030%
Benzene0.390%
Carbon Tetrachloride0.080%
Lead0.130%
Mercury0.010%

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, StatePopulationAir Quality IndexNational Avg.
Marine City, MI4,161524%
Pearl Beach, MI2,948524%
Marysville, MI9,775524%
Port Huron, MI29,388524%
Algonac, MI4,047524%
St. Clair, MI5,395524%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
St. Robert, MO5,3963726%
Conley, GA5,397524%
Samsula-Spruce Creek, FL5,3923530%
Fox Chapel, PA5,3925612%
Starke, FL5,3983334%
St. Clair, MI5,395524%
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.