Thousand Islands National Park Weather in April

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

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Brockville

Are you planning a trip a to Thousand Islands National Park, Canada in April and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Thousand Islands National Park in April

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

Temperatures

You can expect cold maximum daytime temperatures of around 12°C (54°F) and nighttime temperatures around 2°C (36°F) in Brockville.

To explore the conditions in Thousand Islands National Park, Canada in more detail, check the map below.

Precipitation

April is a moderate rainy month with an average rainfall of around 91 mm (3.6 in) in Brockville.

Average sunshine

Most areas see decent amounts of sunshine this month. Brockville gets around 162 hours of sunlight, providing a pleasant balance of sun and clouds. If you'd prefer more guaranteed sunshine, our weather planner can show you sunnier spots around the world.

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 April

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 April for the most popular destinonation in Thousand Islands National Park, Canada?

Brockville

In April Brockville generally has low temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 2°C (36°F) and moderate monthly rainfall. So on average the conditions are unpleasant that month.

« March
April
May »
March
April
May
Max temperature
4°C (39°F)
12°C (54°F)
20°C (68°F)
Min temperature
-5°C (23°F)
2°C (36°F)
9°C (48°F)
Monthly sun hours
145 hours
162 hours
220 hours
Monthly rainfall
64 mm (2.5 in)
91 mm (3.6 in)
84 mm (3.3 in)
Monthly rainy days
12 days
14 days
13 days
Weather conditions
poor
unpleasant
perfect
Climate in Brockville →

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

In our records: Canada April extremes

Notable April records observed across cities in Canada in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • From our sources, the wettest April day in Canada brought 290 mm (11 in) in Niagara on the Lake on April 27, 1981.

Thousand Islands National Park weather in April: frequently asked questions

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

Expect unpleasant weather across Thousand Islands National Park, Canada in April. The popular destination of Brockville averages 12°C (54°F) by day and 2°C (36°F) at night during this month.

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

Daytime temperatures in Brockville peak at roughly 12°C (54°F) in April, dropping to about 2°C (36°F) overnight.

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

Not particularly. Brockville averages just 91 mm (3.6 in) of rain in April, making it a mostly dry month for Thousand Islands National Park, Canada.

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

In our view, April might not be the best time to travel to Thousand Islands National Park, Canada with often unpleasant weather in Brockville.

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

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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