With a population of around 9,300, Dorchester sits in Ontario, Canada. The city operates in the Eastern Time Zone.
In 2025, Dorchester recorded an average annual temperature of 47°F. The hottest temperatures reached 89°F in June; the coolest were -8°F in January. Total precipitation for the year was 36 inches, with the wettest month being December. Snowfall for the year totaled approximately 25 inches.
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