Whether you're visiting Thousand Islands National Park in Canada during the peak of July (26°C (79°F)) or the cooler months around February (-2°C (28°F)), knowing what to pack starts with understanding the local climate. Our overview is based on data from Brockville, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Thousand Islands National Park, the months of May, June, July, August and September bring pleasant weather, with average temperatures ranging between 20°C (68°F) and 26°C (79°F).
The colder period typically falls in the months of January, February, March, November and December.
When it comes to rainfall, Thousand Islands National Park experiences moderate variations in precipitation across the seasons. You can expect around 119 mm (4.7 in) of rain in October, dropping to 64 mm (2.5 in) in March.
July is the sunniest period, with ideal conditions for exploring the region and all it has to offer.
