Montreal Weather in August
In August, Montreal averages a high of 25°C (77°F) and a low of 17°C (62°F), based on 51 years of historical weather data from MONTREAL MCGILL.
25°C
Average high
77°F
17°C
Average low
62°F
36°C
Record high
96°F · 1975
4°C
Record low
40°F · 1981
What to Expect in Montreal in August
Typical August days in Montreal reach 25°C (77°F) during the afternoon and cool to around 17°C (62°F) overnight. On average, measurable rain falls on about 40% of days this month. Over the past 51 years, August temperatures in Montreal have ranged from a record high of 36°C (1975) down to a record low of 4°C (1981).
For a day-by-day look or other months, see the full Montreal weather history.