<page_title> Thunder Bay </page_title> <section_title> Climate </section_title> <table> <cell> −14.3 (6.3) <col_header> Climate data for Thunder Bay Airport, 1981−2010 normals, extremes 1877−present </col_header> <col_header> Jan </col_header> <row_header> Daily mean °C (°F) </row_header> </cell> <cell> 17.7 (63.9) <col_header> Climate data for Thunder Bay Airport, 1981−2010 normals, extremes 1877−present </col_header> <col_header> Jul </col_header> <row_header> Daily mean °C (°F) </row_header> </cell> </table>
In Thunder Bay, the average daily temperatures range from 17.7 °C (63.9 °F) in July to −14.3 °C (6.3 °F) in January.