Boston vs Montreal

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Boston edges ahead as the better destination in September. Boston offers 9 hours of daily sunshine with only 8 rain days, while Montreal sees 9 sunshine hours and 10 rain days.

Boston sits in the comfortable travel range at 23°C. Montreal is also comfortable at 21°C.

For travelers who prioritize dry weather, Boston is the stronger choice in September.

Boston reaches an average high of 23°C (73°F) and drops to 15°C (59°F) at night during September. The daily temperature range is 8°C, meaning moderate variation throughout the day.

Montreal averages 21°C (70°F) for the high and 13°C (55°F) for the low, with a daily range of 8°C. The 2°C difference is noticeable but not dramatic.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.

Boston receives approximately 90 mm of rainfall across 8 rain days during September. You can expect rain roughly every other day.

Montreal sees 98 mm over 10 rain days. That makes Boston the drier option by 2 rain days and 8 mm of total precipitation.

Both cities share similar humidity levels at 65%.