Climate almanac

Chatham

Ontario, Canada · 42.41°, -82.18°

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What is the climate like in Chatham?

The best time to visit Chatham is typically June – September, with trip comfort peaking in September (7.2/10). Chatham is warmest in July, when daily highs average 82°F (28°C), and coolest in January, when lows fall to about 23°F (-5°C). The wettest month is typically July and the driest is November; the year sees roughly 38 in (964 mm) of precipitation.

  • Best time to visitJune – September — comfort peaks in September (7.2/10)
  • Warmest monthJuly — average high 82°F (28°C)
  • Coolest monthJanuary — average low 23°F (-5°C)
  • Wettest monthJuly (3.8 in (97 mm))
  • Driest monthNovember (2.5 in (65 mm))
  • Annual precipitation38 in (964 mm)
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
  • Records fromRidgetown Rcs, 25 km away (2003-2024)