Boston weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: May – September
What is the weather like in Boston in October?
In October, Boston is mild: daytime highs average 16 °C, and nights cool down to about 9 °C. The sea averages 14.0 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 109 mm in total. All in all, October is a good month for a holiday in Boston.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 82 | 66 | 35 |
| Day | 22° | 16° | 10° |
| Night | 15° | 9° | 4° |
| Sea | 18° | 14° | 10° |
| Sun | 6 h | 5 h | 5 h |
| Rain days | 8 | 10 | 9 |
More details for October
- Daylight
- 11 h 9 min06:56 – 18:04
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 50 %81 %
- Sunshineweight 20 %38 %
- Few rainy daysweight 30 %59 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Boston in October: quick answers
Is Boston hot in October?
No. In October, Boston is mild: daytime highs average 16 °C and nights drop to about 9 °C.
Can you swim in Boston in October?
Only if you don't mind cold water: in October the sea averages just 14.0 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Boston in October?
Rain is frequent, with about 10 rainy days and 109 mm in total.
Boston month by month
The whole year in BostonAll destinations: USAWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences