Brockville Weather in May
With daytime temperatures of 20°C (68°F) and nighttime lows of 9°C (48°F), May in Brockville brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 84 mm (3.3 in) falls on average.
Rainfall in Brockville in May
Expect around 13 days of rain based on historical data, with 84 mm (3.3 in) average. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Brockville in May
Weather in Brockville is at its perfect in May. Highs reach 20°C (68°F), while nights settle around 9°C (48°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights fall to 9°C (48°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Brockville in May
Enjoy a sunny month with about 220 hours of sunshine, the clear skies make Brockville even more beautiful.If your ideal day consists of dry skies and pleasant temperatures, May, July, August and September typically offer the best circumstances for Brockville.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Brockville's climate page.
Brockville Temperature in May
Min Temperature
9°C (48°F)
Max Temperature
20°C (68°F)
Chance of Rain
43%
Precipitation
84 mm (3.3 in)
Rainy days
13 days
Sunshine
220 hours *
Percentage Sunshine
48% *
Daily Historical Temperatures
49-year average (1977-2025)
Based on our historical records, temperatures in Brockville typically rise from around 16°C (61°F) at the start of May to approximately 21°C (70°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 10°C (50°F).
Average temperatures in May
Daily Historical Precipitation
49-year average (1977-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Brockville in May
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 May
Based on 49 years of weather observations (1977-2026), these are the most extreme conditions recorded in Brockville.
- The hottest May day on record in Brockville reached 32°C (90°F) (May 26, 2010).
Best Places in Canada in May
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in May →
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What to Wear in Brockville in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Brockville in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Brockville's climate page.
See the full Brockville climate overview or explore weather in Canada.
