About Tillsonburg, 08's Climate & Weather History

Tillsonburg is a city of approximately 18,600 people in Ontario, Canada. Located in the Eastern Time Zone at 42.9°N latitude.

In 2025, Tillsonburg recorded an average annual temperature of 48°F. The hottest temperatures reached 90°F in June; the coolest were -4°F in January. Total precipitation for the year was 33 inches, with the wettest month being March. Snowfall for the year totaled approximately 19 inches.