Weather Comparison
Side-by-side weather comparison for September
| Metric | Boston | New York | Better |
|---|---|---|---|
| Average HighHigher is warmer | 23°C (73°F) | 24°C (75°F)▲ | New York |
| Average LowHigher is milder | 15°C (59°F) | 16°C (61°F)▲ | New York |
| Rain DaysFewer is drier | 8 days▲ | 9 days | Boston |
| PrecipitationLess is drier | 90 mm▲ | 98 mm | Boston |
| Sunshine HoursMore is sunnier | 9h/day | 9h/day | Tie |
| HumidityLower is more comfortable | 65% | 65% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 18 km/h | 16 km/h▲ | New York |
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 New York sees 9 sunshine hours and 9 rain days.
Boston sits in the comfortable travel range at 23°C. New York is also comfortable at 24°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.
New York averages 24°C (75°F) for the high and 16°C (61°F) for the low, with a daily range of 8°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 September.
Boston receives approximately 90 mm of rainfall across 8 rain days during September. You can expect rain roughly every other day.
New York sees 98 mm over 9 rain days. That makes Boston the drier option by 1 rain day and 8 mm of total precipitation.
Both cities share similar humidity levels at 65%.
Highs of 23°C, lows of 15°C, 8 rain days
Highs of 24°C, lows of 16°C, 9 rain days
Pack for both: light layers, a light jacket for evenings, sunscreen, a packable rain jacket, an umbrella. These items are useful in either destination during September.
The table below shows average high temperatures and rain days for every month. September is highlighted for quick reference.
| Month | Boston | New York | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 2°C | 10d | 4°C | 9d |
| Feb | 3°C | 9d | 5°C | 9d |
| Mar | 7°C | 11d | 9°C | 10d |
| Apr | 14°C | 11d | 15°C | 11d |
| May | 19°C | 11d | 21°C | 11d |
| Jun | 25°C | 10d | 26°C | 11d |
| Jul | 28°C | 10d | 29°C | 12d |
| Aug | 27°C | 9d | 28°C | 11d |
| Sep | 23°C | 8d | 24°C | 9d |
| Oct | 16°C | 10d | 18°C | 9d |
| Nov | 10°C | 10d | 12°C | 8d |
| Dec | 5°C | 11d | 6°C | 10d |
Boston Weather in September
Full forecast, packing tips, and activities
New York Weather in September
Full forecast, packing tips, and activities