Brockville (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Brockville.
Climate overview of Brockville
Temperatures in Brockville, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 26°C (79°F), while February is the coldest at -3°C (27°F).
Rain/snowfall is high, totalling around 1056 mm (42 in) per year. October is the wettest month and March the driest. The city also experiences warm summers and very cold winters. The sunniest month is July, with 9.3 hours of sunshine per day on average.
Brockville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Brockville - and find the best time to visit.
Monthly Temperature in Brockville
The climate in Brockville is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 26°C (79°F) in July, the warmest time of the year, to a very cold -3°C (27°F) during cooler months like February.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -11°C (12°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Brockville
Brockville has a notably wet climate with abundant precipitation, recording 1056 mm (42 in) of rain/snowfall per year. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 119 mm (4.7 in) of precipitation, spread over 16 rainy days.
In contrast, the driest month March experiences a drier climate, with about 64 mm (2.5 in) of snow/rainfall spread across 12 snowy/rainy days. For more details, please visit our Brockville Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Brockville
Seasonal changes in sunshine hours are quite dramatic in Brockville. While July receives considerable daily sunshine with up to 9.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.5 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Best Time to Visit Brockville
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: February, with freezing nights around -11°C (12°F).
Frequently asked questions about the climate in Brockville
What is the best time to visit Brockville?
May, July, August and September typically offer the most optimal weather in Brockville. In contrast, January, February, March, November and December tend to have less optimal conditions. Brockville has warm summers and very cold winters.
What temperatures can I expect in Brockville?
Daytime highs range from -3°C (27°F) in February to 26°C (79°F) in July. Nighttime lows range from -11°C (12°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Brockville get?
Annual rainfall is around 1056 mm (42 in). October is the wettest month with 119 mm (4.7 in), while March is the driest with 64 mm (2.5 in).
How sunny is Brockville?
Brockville receives around 1,971 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 75 hours.
Brockville 3-Day Forecast
Brockville (ON) 3-Day Forecast
Brockville on the map
Brockville is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Niagara Falls
27°C (81°F) Montréal28°C (82°F) Ottawa27°C (81°F) Quebec City
26°C (79°F) Toronto26°C (79°F) Calgary24°C (75°F) Vancouver22°C (72°F) Whistler
19°C (66°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
Canoeing the south Nahannii
The South Nahanni in the northwest of Canada is one of the most impressive wilderness rivers in the world. Canoeing the south Nahanni is something you must add to your bucket list.
See Polar Bears in Churchill Canada
Thousands of bears gather at the small town of Churchill. In the evening the northern lights give a light show against the dark evening sky. An unforgettable experience.
Banff National Park
Snowy mountains, clear blue lakes and green forests make Banff National Park a wonderful bucket list destination. The pristine wilderness is a mecca for walkers.