Climate almanac

Acton

Ontario, CA · 43.63°, -80.04°

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What is the climate like in Acton?

The best time to visit Acton is typically June – September, with trip comfort peaking in September (7.1/10). Acton is warmest in July, when daily highs average 80°F (27°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically April and the driest is September; the year sees roughly 37 in of precipitation.

  • Best time to visitJune – September — comfort peaks in September (7.1/10)
  • Warmest monthJuly — average high 80°F (27°C)
  • Coolest monthJanuary — average low 17°F (-8°C)
  • Wettest monthApril (3.8 in)
  • Driest monthSeptember (2.3 in)
  • Annual precipitation37 in