Thousand Islands National Park Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Thousand Islands National Park, Canada in September.

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Brockville

Planning a getaway to Thousand Islands National Park, Canada this September and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Thousand Islands National Park in September

Thousand Islands National Park, Canada is a region in Canada. September in Thousand Islands National Park generally has pleasant temperatures, with moderate precipitation.

Temperatures

You can expect pleasant maximum daytime temperatures of around 22°C (72°F) and nighttime temperatures around 12°C (54°F) in Brockville.

For specific regional insights in Thousand Islands National Park, Canada, refer to the map provided below.

Precipitation

September is a moderate rainy month with an average rainfall of around 85 mm (3.3 in) in Brockville.

Average sunshine

Sunshine levels are moderate in most locations. Brockville typically sees 165 hours of sunlight, creating comfortable conditions that aren't too bright or too dim. Looking for something sunnier? Our weather planner helps you discover destinations with more reliable sunshine.

Explore Thousand Islands National Park by month

Pick a month to see the average temperature, rainfall and sunshine in Thousand Islands National Park - and find the best time to visit. (based on Brockville)

January-2°C (28°F) February-3°C (27°F) March4°C (39°F) April12°C (54°F) May20°C (68°F) June23°C (73°F) This monthJuly26°C (79°F) August26°C (79°F) September22°C (72°F) October14°C (57°F) November8°C (46°F) December1°C (34°F)
Best Time to Visit Thousand Islands National Park →

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
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Thousand Islands National Park

What is the weather like in September for the most popular destinonation in Thousand Islands National Park, Canada?

Brockville

In September Brockville generally has pleasant temperatures with maximum daytime temperatures around 22°C (72°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are excellent that month.

« August
September
October »
August
September
October
Max temperature
26°C (79°F)
22°C (72°F)
14°C (57°F)
Min temperature
16°C (61°F)
12°C (54°F)
6°C (43°F)
Monthly sun hours
241 hours
165 hours
141 hours
Monthly rainfall
93 mm (3.7 in)
85 mm (3.3 in)
119 mm (4.7 in)
Monthly rainy days
13 days
12 days
16 days
Weather conditions
excellent
excellent
mixed
Climate in Brockville →

Is your destination not in the list? Have a look at all destinations in Thousand Islands National Park, in Canada.

Thousand Islands National Park weather in September: frequently asked questions

What is the weather like in Thousand Islands National Park, Canada in September?

Thousand Islands National Park, Canada typically experiences excellent weather in September, part of the season. Daytime highs in Brockville average around 22°C (72°F), and temperatures drop to about 12°C (54°F) at night.

What is the average temperature in Thousand Islands National Park, Canada in September?

Average temperatures in Thousand Islands National Park, Canada during September range from a nighttime low near 12°C (54°F) to a daytime high around 22°C (72°F) in Brockville.

Does Thousand Islands National Park, Canada get a lot of rain in September?

Rain is generally moderate to light in Thousand Islands National Park, Canada during September, with Brockville averaging close to 85 mm (3.3 in).

Is September a Good Time to Visit Thousand Islands National Park, Canada?

We believe that September is one of the best times to visit Thousand Islands National Park, Canada with overall excellent weather in Brockville. However, the weather conditions may vary depending on your destination.

Generally speaking, the best visiting conditions can be found in May, July, August and September offering mostly excellent weather in Brockville. The weather in January, February, March, November and December, on the other hand, tends to be less favorable.

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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