Boston in september: average Weather, Temperature and Climate
Weather in Boston in september 2025
The weather in Boston in september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
63°F
Clear/Sunny
44% of time
25%
13%
11%
Weather at 12pm
76°F
Clear/Sunny
46% of time
26%
14%
11%
Weather at 6pm
67°F
Clear/Sunny
46% of time
27%
10%
9%
Weather at 3am
61°F
40%
21%
15%
12%
Evolution of daily average temperature and precipitation in Boston in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Boston in september.
The climate of Boston in september is good
In september in Boston, the climate is quite dry (with 3.1in of rainfall over 4 days). The weather is better from the previous month since in august it receives an average of 3.9in of rainfall over 5 days.
The climate quite good in this location september. The high seasonal norm is 76°F. The minimum is 63°F. Thus, the mean temperature average in september in Boston is 70°F. Note that seasonal normals in contrast with those observed in Boston in september with a maximum record of 97°F in 2015 and a minimum record of 49°F in 2009. You can hope to have about 28 days with temperatures above 65°F, or 93% of time.
Day length in Boston in september is 12:29. Sunrise is at 05:25 and sets at 17:54.
With good weather conditions, september is advisable to go in Boston in United States.
Seasonal average climate and temperature of Boston in september
Check below seasonal norms These statistics are compiled from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 70°F | ||||
| Highest temperature | 76°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 97°F (2015) | ||||
| Lowest record temperature | 49°F (2009) | ||||
| Number of days at +86°F | 4 day(s) (13%) | ||||
| Number of days at +65°F | 28 day(s) (93%) | ||||
| Sea temperature | |||||
| Average sea temperature | 65°F | ||||
| Lowest sea temperature | 62°F | ||||
| Highest sea temperature | 68°F | ||||
| Wind | |||||
| Wind speed | 15km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.1in | ||||
| Number of days with rainfall | 4 day(s) (13%) | ||||
| Record daily rainfall | 2.8in (2015) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 82% | ||||
| Visibility | 9.09km | ||||
| Cloud cover | 36% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:25 | ||||
| Time of sunset | 17:54 | ||||
| Length of day | 12:29 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Boston in september 2024:
68°F to 76°F
65°F to 77°F
52°F to 74°F
56°F to 77°F
58°F to 76°F
58°F to 72°F
58°F to 72°F
52°F to 68°F
54°F to 76°F
58°F to 76°F
54°F to 74°F
56°F to 79°F
59°F to 86°F
61°F to 77°F
61°F to 77°F
56°F to 79°F
58°F to 83°F
63°F to 70°F
61°F to 65°F
63°F to 65°F
59°F to 61°F
59°F to 63°F
59°F to 63°F
58°F to 63°F
59°F to 61°F
59°F to 67°F
59°F to 70°F
58°F to 67°F
56°F to 61°F
58°F to 67°F
Map: other cities in the United States (USA) in september
Cities near Boston:
| Massachusetts in september | perfect weather |
| Hampton Beach in september | good weather |
| Provincetown in september | good weather |
| Rhode Island in september | perfect weather |
| Cape Cod National Seashore in september | good weather |
| Old Orchard Beach in september | good weather |
| Nantucket Island (Massachusetts) in september | good weather |
| Connecticut in september | good weather |
| Albany in september | good weather |
| Vermont in september | good weather |
| Brooklyn in september | good weather |
| New York City in september | good weather |
Click over cities on the map for information about the weather in september.
Boston
perfect weather
good
tolerable
bad
very bad
Weather data for Boston in september:
Weather data for Boston for september are derived from an average of the weather forecast since 2009 in Boston. There is a margin of error and these forecasts are to be considered as general information only. The weather in Boston can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Boston.