Climate almanac

Ajax

Ontario, CA · 43.85°, -79.03°

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What is the climate like in Ajax?

The best time to visit Ajax is typically July – September, with trip comfort peaking in September (7.2/10). Ajax is warmest in August, when daily highs average 74°F (23°C), and coolest in January, when lows fall to about 24°F (-4°C). The wettest month is typically April and the driest is September; the year sees roughly 40 in of precipitation.

  • Best time to visitJuly – September — comfort peaks in September (7.2/10)
  • Warmest monthAugust — average high 74°F (23°C)
  • Coolest monthJanuary — average low 24°F (-4°C)
  • Wettest monthApril (4.4 in)
  • Driest monthSeptember (2.5 in)
  • Annual precipitation40 in