Weather Comparison
Boston vs Montreal
Side-by-side weather comparison for May
May Weather: Boston vs Montreal
| Metric | Boston | Montreal | Better |
|---|---|---|---|
| Average HighHigher is warmer | 19°C (66°F) | 19°C (66°F) | Tie |
| Average LowHigher is milder | 10°C (50°F)▲ | 8°C (46°F) | Boston |
| Rain DaysFewer is drier | 11 days▲ | 12 days | Boston |
| PrecipitationLess is drier | 80 mm▲ | 98 mm | Boston |
| Sunshine HoursMore is sunnier | 10h/day | 10h/day | Tie |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 9▲ | 10 | Boston |
| Wind SpeedCalmer is better | 20 km/h | 19 km/h▲ | Montreal |
Which City is Better in May?
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Boston edges ahead as the better destination in May. Boston offers 10 hours of daily sunshine with only 11 rain days, while Montreal sees 10 sunshine hours and 12 rain days.
Boston sits in the comfortable travel range at 19°C. Montreal is also comfortable at 19°C.
For travelers who prioritize dry weather, Boston is the stronger choice in May.
Temperature Comparison in May
Boston reaches an average high of 19°C (66°F) and drops to 10°C (50°F) at night during May. The daily temperature range is 9°C, meaning moderate variation throughout the day.
Montreal averages 19°C (66°F) for the high and 8°C (46°F) for the low, with a daily range of 11°C. The two cities feel quite similar in terms of temperature.
Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in May.
Rainfall Comparison in May
Boston receives approximately 80 mm of rainfall across 11 rain days during May. You can expect rain roughly every other day.
Montreal sees 98 mm over 12 rain days. That makes Boston the drier option by 1 rain day and 18 mm of total precipitation.
Both cities share similar humidity levels at 65%.
What to Pack: Boston vs Montreal
Packing for Boston in May
Highs of 19°C, lows of 10°C, 11 rain days
- ✓warm layers
- ✓a mid-weight jacket
- ✓long trousers
- ✓waterproof jacket
- ✓compact umbrella
- ✓waterproof shoes
Packing for Montreal in May
Highs of 19°C, lows of 8°C, 12 rain days
- ✓warm layers
- ✓a mid-weight jacket
- ✓long trousers
- ✓waterproof jacket
- ✓compact umbrella
- ✓waterproof shoes
Pack for both: warm layers, a mid-weight jacket, long trousers, waterproof jacket, compact umbrella, waterproof shoes. These items are useful in either destination during May.
Year-Round Comparison: Boston vs Montreal
The table below shows average high temperatures and rain days for every month of the year, helping you find the best time to visit either city.May is highlighted for quick reference.
| Month | Boston | Montreal | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 2°C | 10d | -5°C | 11d |
| Feb | 3°C | 9d | -3°C | 10d |
| Mar | 7°C | 11d | 3°C | 11d |
| Apr | 14°C | 11d | 11°C | 12d |
| May | 19°C | 11d | 19°C | 12d |
| Jun | 25°C | 10d | 23°C | 12d |
| Jul | 28°C | 10d | 26°C | 13d |
| Aug | 27°C | 9d | 25°C | 12d |
| Sep | 23°C | 8d | 21°C | 10d |
| Oct | 16°C | 10d | 13°C | 12d |
| Nov | 10°C | 10d | 6°C | 12d |
| Dec | 5°C | 11d | -1°C | 12d |
Boston Weather in May
Full forecast, packing tips, and activities
Montreal Weather in May
Full forecast, packing tips, and activities