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Toronto Sees Largest Seasonal Temperature Rise Among MLB Cities

Climate Central’s comparison of in-season averages across 27 North American baseball markets yields fresh insights into regional warming patterns

Toronto Blue Jays' George Springer, right, is doused by teammates after they defeated the New York Yankees in Toronto on Thursday, July 3, 2025. THE CANADIAN PRESS/Thomas Skrlj

Overview

  • Toronto’s in-season average temperature has climbed 3.0 °C since 1970, the highest increase among Major League Baseball cities
  • Phoenix recorded the second-largest gain with a 2.8 °C rise during the Diamondbacks’ season
  • Overall, in-season temperatures across all 27 MLB cities have increased about 1.7 °C over the past four decades
  • Global average temperatures are already 1.5 °C above preindustrial levels due to climate change and fossil fuel emissions
  • Environment and Climate Change Canada reports that the nation is warming at twice the global mean rate