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Massachusetts weather in September 2025
Expect 23°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Massachusetts in September. Check more long-term weather averages for Massachusetts in September before you book your next holiday to Massachusetts in 2025/2026.
- 23°C max day temperature
23 - 8 hours of sunshine per day
- 8 days with some rainfall
8 - 12°C min night temperature
12 - 12 hours of daylight per day
12 - No heat & humidity
0 - 82 mm of monthly rainfall
82 - 6 (High) UV index
6 - 16°C sea temperature
16
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The September weather guide for Massachusetts (Boston) 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.
Top Massachusetts destinations
Below are average maximum temperatures at popular countries, regions and places in Massachusetts in September. Select a holiday destination to see more weather parameters.
All Massachusetts destinations
- Boston
- Chatham
- Martha's Vineyard
- Nantucket
- New Bedford
- Newburyport
- Pittsfield
- Provincetown
- Salem
- Springfield
- Worcester
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Massachusetts in September?
Daytime temperatures usually reach 23°C in Boston, Massachusetts in September, falling to 12°C at night.
How sunny is it in Massachusetts in September?
There are normally 8 hours of bright sunshine each day in Boston, Massachusetts in September - that's 61% of daylight hours.
How warm is the sea around Massachusetts in September?
The average sea temperature around Boston, Massachusetts in September is 16°C.
Does it rain in Massachusetts in September?
There are usually 8 days with some rain in Boston, Massachusetts in September and the average monthly rainfall is 82mm.
What is the chance of a hurricane in Massachusetts in September?
On average less than 1 day in September in Boston, Massachusetts is likely to be affected by the passage of one or more tropical storms.
Massachusetts September sunrise & sunset times
Browse the sunrise and sunset times for Massachusetts in September 2025. Select a month to view Massachusetts sunrise and sunset times for the next 12 months. The Massachusetts sunrise and sunset times shown below are for Boston.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 05:10 | 18:18 |
| Monday, 15th September 2025 | 05:24 | 17:53 |
| Tuesday, 30th September 2025 | 05:41 | 17:27 |
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