Montreal · August
Run in the morning.
Comfortable average high of 77°F, dipping to 63°F at night. Expect 16 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
77° / 63°F
Humidity
74%
Rain days
16/mo
Wind
10 mph
What August feels like in Montreal
Sunrise
05:56
Mid-month average
Sunset
19:59
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Montreal in August
The kit for August in Montreal: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
-2° avg high
-1 rain days
Montreal in July →
August
77°F avg high
16 rain days
Best: morning
vs September
+7° avg high
+4 rain days
Montreal in September →
Frequently Asked Questions
What is the best time of day to run in Montreal in August?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Montreal in August?+
Average high 77°F, average low 63°F.
How does August compare to surrounding months in Montreal?+
Compared to July (avg high 79°F), August is cooler. Compared to September (avg high 71°F), August is warmer.
Does it rain often in Montreal in August?+
Expect about 16 measurable rain days in August, on average.