Montréal Weather in May
Montréal in May sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 8°C (46°F). Rainfall is fairly high this month at around 101 mm (4 in), so pack a rain jacket to stay dry.
Rainfall in Montréal in May
Based on our climate data of the past 30 years, about 13 days of rain are anticipated, with 101 mm (4 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Montréal in May
In May, expect pleasant temperatures in Montréal, with highs of 20°C (68°F) and lows of 8°C (46°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 8°C (46°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Montréal in May
Expect sunny days throughout the month, with an estimated 230 hours of sunshine. This makes it a pleasant time to visit Montréal.
Wind Speed in Montréal in May
May sees wind speeds averaging 6 m/s (12 knots). You'll experience strong winds that cause whole trees to sway and require effort when walking against them. As an average, expect variation from moderate breezes to particularly windy days that affect daily routines.
Average water temperature in May
The water sits at 8°C (46°F) this month, which is well below what most people consider swimmable. Wetsuits help, but expect it to still feel cold.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Montréal.
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 Montréal's climate page.
Montréal Temperature in May
Min Temperature
8°C (46°F)
Max Temperature
20°C (68°F)
Water Temperature
8°C (46°F)
Chance of Rain
42%
Precipitation
101 mm (4 in)
Rainy days
13 days
Humidity
51%
Windspeed
6 m/s (12 knots)
Sunshine
230 hours
Percentage Sunshine
51%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Montréal typically rise from around 16°C (61°F) at the start of May to approximately 22°C (72°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°F) to 12°C (54°F).
Average temperatures in May
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 May
Historical weather for Montréal in May
Browse day-by-day weather records for Montréal spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Montréal historical weather extremes in May
Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Montréal.
- Montréal recorded its highest May temperature of 35°C (95°F) on May 27, 2020.
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 Montréal 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. The water temperature sits at about 8°C (46°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Montréal 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 Montréal's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Montréal climate overview or explore weather in Canada.
