Measurements:
°C
°F
CURRENT WEATHER
18:10
Montreal
70°F
W 6 mph
Feels like: 70°F
Precip: 57%
World Resorts Canada Montreal Weather

7 Day Weather Forecast

09.08
tue
DAY
68°F
SW 7 mph
precip
59%
NIGHT
58°F
NW 4 mph
precip
57%
09.09
wed
DAY
68°F
N 10 mph
precip
23%
NIGHT
70°F
E 15 mph
precip
49%
09.10
thu
DAY
72°F
E 16 mph
precip
17%
NIGHT
54°F
SE 6 mph
precip
16%
09.11
fri
DAY
62°F
E 11 mph
precip
2%
NIGHT
58°F
E 5 mph
precip
7%
09.12
sat
DAY
68°F
N 5 mph
precip
2%
NIGHT
60°F
N 6 mph
precip
20%
09.13
sun
DAY
72°F
NE 9 mph
precip
11%
NIGHT
64°F
NW 6 mph
precip
73%
09.14
mon
DAY
70°F
E 5 mph
precip
3%
NIGHT
56°F
SW 8 mph
precip
16%

Montreal Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Montreal was 19.3°F. The maximum and minimum values were 17.9°F and 20.9°F respectively.

Montreal on the Weather Map

Best Time to Visit Montreal
The most sunny months:
July 14 days
August 14 days
June 13 days
The most warm months:
July 82.6 °F
August 80.2 °F
June 75.5 °F
Warmest sea temperature:
August 74.4 °F
July 74.4 °F
September 68.5 °F
The most cold months:
January 16.2 °F
February 19.0 °F
December 25.0 °F
The most rainy months:
June 5 days
May 5 days
July 5 days
The most windy months:
April 9 mph
March 9 mph
February 9 mph
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