Boston weather in September 2019

  • 23°C maximum daytime temperature in September in Boston23
    23°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Boston8
    8 days with some rainfall
  • 12°C minimum night-time temperature in September in Boston12
    12°C min night temperature
  • 12 hours of daylight per day in September in Boston12
    12 hours of daylight per day
  • No heat & humidity in September in Boston0
    No heat & humidity
  • 82 mm monthly rainfall in September in Boston82
    82 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Boston6
    6 (High) UV index
  • 16°C sea temperature in September in Boston16
    16°C sea temperature

Going to Boston? Find the best month to visit Boston based on the weather.

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Expect 23°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Boston in September. Check more long-term weather averages for Boston in September before you book your next holiday to Massachusetts in 2019/2020.

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More about Boston

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The September weather guide for Boston, Massachusetts shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Guide to Boston weather in September

The average maximum daytime temperature in Boston in September is a warm 23°C (73°F). The average night-time temperature is usually a cool 12°C (54°F). There are usually 8 hours of bright sunshine each day, which represents 61% of the 12 hours of daylight.

Expect 82mm (3.2 inches) of rainfall across the whole of September with 8 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.

The average sea temperature in and around Boston in September is 16°C (61°F).

Boston sunrise & sunset times for September 2019

Browse the sunrise & sunset times for Boston in September 2019. Select a month to view Boston sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Sunday, 1st September 2019 06:09 19:19
Monday, 2nd September 2019 06:10 19:17
Tuesday, 3rd September 2019 06:11 19:15
Wednesday, 4th September 2019 06:12 19:13
Thursday, 5th September 2019 06:13 19:12
Friday, 6th September 2019 06:14 19:10
Saturday, 7th September 2019 06:15 19:08
Sunday, 8th September 2019 06:16 19:07
Monday, 9th September 2019 06:18 19:05
Tuesday, 10th September 2019 06:19 19:03
Wednesday, 11th September 2019 06:20 19:01
Thursday, 12th September 2019 06:21 19:00
Friday, 13th September 2019 06:22 18:58
Saturday, 14th September 2019 06:23 18:56
Sunday, 15th September 2019 06:24 18:54
Monday, 16th September 2019 06:25 18:53
Tuesday, 17th September 2019 06:26 18:51
Wednesday, 18th September 2019 06:27 18:49
Thursday, 19th September 2019 06:28 18:47
Friday, 20th September 2019 06:29 18:46
Saturday, 21st September 2019 06:30 18:44
Sunday, 22nd September 2019 06:31 18:42
Monday, 23rd September 2019 06:32 18:40
Tuesday, 24th September 2019 06:33 18:38
Wednesday, 25th September 2019 06:35 18:37
Thursday, 26th September 2019 06:36 18:35
Friday, 27th September 2019 06:37 18:33
Saturday, 28th September 2019 06:38 18:31
Sunday, 29th September 2019 06:39 18:30
Monday, 30th September 2019 06:40 18:28
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