Weather Comparison
Montreal vs Boston
Side-by-side weather comparison for May
May Weather: Montreal vs Boston
| Metric | Montreal | Boston | Better |
|---|---|---|---|
| Average HighHigher is warmer | 19°C (66°F) | 19°C (66°F) | Tie |
| Average LowHigher is milder | 8°C (46°F) | 10°C (50°F)▲ | Boston |
| Rain DaysFewer is drier | 12 days | 11 days▲ | Boston |
| PrecipitationLess is drier | 98 mm | 80 mm▲ | Boston |
| Sunshine HoursMore is sunnier | 10h/day | 10h/day | Tie |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 10 | 9▲ | Boston |
| Wind SpeedCalmer is better | 19 km/h▲ | 20 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.
Montreal sits in the comfortable travel range at 19°C. Boston is also comfortable at 19°C.
For travelers who prioritize dry weather, Boston is the stronger choice in May.
Temperature Comparison in May
Montreal reaches an average high of 19°C (66°F) and drops to 8°C (46°F) at night during May. The daily temperature range is 11°C, meaning moderate variation throughout the day.
Boston averages 19°C (66°F) for the high and 10°C (50°F) for the low, with a daily range of 9°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
Montreal receives approximately 98 mm of rainfall across 12 rain days during May. You can expect rain roughly every other day.
Boston sees 80 mm over 11 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: Montreal vs Boston
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
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
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: Montreal vs Boston
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 | Montreal | Boston | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | -5°C | 11d | 2°C | 10d |
| Feb | -3°C | 10d | 3°C | 9d |
| Mar | 3°C | 11d | 7°C | 11d |
| Apr | 11°C | 12d | 14°C | 11d |
| May | 19°C | 12d | 19°C | 11d |
| Jun | 23°C | 12d | 25°C | 10d |
| Jul | 26°C | 13d | 28°C | 10d |
| Aug | 25°C | 12d | 27°C | 9d |
| Sep | 21°C | 10d | 23°C | 8d |
| Oct | 13°C | 12d | 16°C | 10d |
| Nov | 6°C | 12d | 10°C | 10d |
| Dec | -1°C | 12d | 5°C | 11d |
Montreal Weather in May
Full forecast, packing tips, and activities
Boston Weather in May
Full forecast, packing tips, and activities