Montreal Weather in May
In May, Montreal averages a high of 19°C (66°F) and a low of 10°C (50°F), based on 51 years of historical weather data from MONTREAL MCGILL.
19°C
Average high
66°F
10°C
Average low
50°F
36°C
Record high
97°F · 2020
-3°C
Record low
27°F · 1978
What to Expect in Montreal in May
Typical May days in Montreal reach 19°C (66°F) during the afternoon and cool to around 10°C (50°F) overnight. On average, measurable rain falls on about 42% of days this month. Over the past 51 years, May temperatures in Montreal have ranged from a record high of 36°C (2020) down to a record low of -3°C (1978).
For a day-by-day look or other months, see the full Montreal weather history.