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  • About Global Great Lakes
    • Mean annual air temperature over lake 8.2 oC 46.8 oF
    Average annual min. air temperature over lake 3.6 oC 38.5 oF
    Average annual max. air temperature over lake 12.7 oC 54.9 oF
    Mean annual air temperature over land 7.3 oC 45.1 oF
    Average annual min. air temperature over land 2.0 oC 35.5 oF
    Average annual max. air temperature over land 12.6 oC 54.7 oF
    Mean annual precipitation* 71.7 mm/yr  
    Average annual total precipitation* 860.8 mm/yr  

    Data summarized from NOAA Great Lakes Environmental Research Laboratory (1948 - 2010)

    *Data summarized from NOAA Great Lakes Environmental Research Laboratory (1920 - 2010)

      

    Air Temperature over Lake

    Air Temperature over Land

    Precipitation

    Data from NOAA Great Lakes Environmental Research Laboratory

     

    Other Resources

    NOAA's National Weather Service