Temperature in Thousand Islands National Park in September

Daytime highs, nighttime lows and the warmest cities in Thousand Islands National Park, Canada this September.

Thousand Islands National Park, Canada, a region in Canada, typically experiences pleasant weather in September, with maximum daytime temperatures around 22°C (72°F) and nighttime temperatures around 12°C (54°F) in Brockville.

What is the temperature of the different cities in Thousand Islands National Park, Canada in September?

Explore the map below to discover average September temperatures at the top destinations in Thousand Islands National Park. For a deeper dive, simply click on any destination dot.

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Check the conditions for any month of the year.

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For a detailed overview over the year and the best time to visit Thousand Islands National Park, check out our Thousand Islands National Park's climate page.

See also: Thousand Islands National Park weather by month.

Best Places to Visit in Thousand Islands National Park in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Thousand Islands National Park.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in September: blue is cold, red is hot.

See all September weather averages, cities and regions in Thousand Islands National Park

Thousand Islands National Park temperatures in September: frequently asked questions

How hot does it get in Thousand Islands National Park, Canada in September?

Daytime temperatures in Brockville typically peak at 22°C (72°F) in September, putting it in the pleasant range.

How cold does it get at night in Thousand Islands National Park, Canada in September?

Nighttime temperatures in Brockville typically drop to around 12°C (54°F) in September.

How much sun does Thousand Islands National Park, Canada get in September?

Most areas experience a moderate amount of sunshine, with approximately 165 hours of sunlight expected in Brockville. This makes it neither too gloomy nor overly bright.

Interested in more climate information?

We have much more information about the climate in Thousand Islands National Park.

Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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