<page_title> Thunder Bay </page_title> <section_title> Climate </section_title> <table> <cell> 40.3 (104.5) <col_header> Climate data for Thunder Bay Airport, 1981−2010 normals, extremes 1877−present </col_header> <col_header> Aug </col_header> <row_header> Record high °C (°F) </row_header> </cell> </table>
The highest temperature recorded in Thunder Bay was 40.3 °C (104.5 °F) in August.