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Brockville Weather in August
Thinking of visiting Brockville in August? Expect high temperatures reaching 26°C (79°F) during the day, dropping to 16°C (61°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Brockville in August
Historically, August sees about 13 days of rain, with a monthly average of 93 mm (3.7 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Brockville in August
The excellent temperature in Brockville in August makes it a solid month to visit, with 26°C (79°F) during the day and 16°C (61°F) at night. Experience the summer season in August. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 16°C (61°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Brockville in August
The city usually sees around 241 hours of sunlight, indicating many sunny days , a great month for sightseeing.If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.
Brockville Temperature in August
Min Temperature
16°C (61°F)
Max Temperature
26°C (79°F)
Chance of Rain
42%
Precipitation
93 mm (3.7 in)
Rainy days
13 days
Sunshine
241 hours *
Percentage Sunshine
55% *
* Data from: Kingston, Canada (74 KM, 46 Miles).
Brockville Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Brockville - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Brockville typically stay consistent throughout August, with daily highs averaging around 26°C (79°F). Nights are cool, with lows typically ranging from 12°C (54°F) to 16°C (61°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather records for Brockville in August
Browse day-by-day weather records for Brockville spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Brockville historical weather extremes in August
Based on 45 years of weather observations (1981-2026), these are the most extreme conditions recorded in Brockville.
- On August 3, 1988, temperatures climbed to 35°C (95°F), marking the warmest August day on record.
- The lowest daytime temperature in August was 11°C (52°F), recorded on August 25, 1995.
- The coldest night in August in Brockville was on August 25, 1995, with a minimum of 0°C (32°F).
Best Places in Canada in August
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in August →
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).
What to Wear in Brockville in August
Warm but pleasant conditions in Brockville in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Brockville in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Brockville 3-Day Forecast
More climate data for Brockville
See the full Brockville climate overview or explore weather in Canada.
Popular in August
Where to go in August - average daytime high across popular destinations.
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