October weather forecastBoston, MA
October
Weather in October
October continues the beautiful descent into fall in Boston. The weather remains mild, but temperatures drop visibly if compared with September. A further change in the weather shows a high of 61.5°F (16.4°C) and a low of 48.4°F (9.1°C). The advent of Halloween brings a unique charm to the city, with jack-o-lanterns scattered on porches, and a mix of costumes seen on the streets. This time of the year is also marked by the gorgeous transformation of the city's foliage into radiant colors.Temperature
Boston in October undergoes a mild reduction in the average high-temperature, shifting from September's pleasant 72.7°F (22.6°C) to a comfortable 61.5°F (16.4°C). October generally records an average low-temperature of 48.4°F (9.1°C).Humidity
The average relative humidity in October is 75%.Rainfall
In October, the rain falls for 13.3 days. Throughout October, 2.56" (65mm) of precipitation is accumulated. Throughout the year, in Boston, there are 141.4 rainfall days, and 27.2" (691mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.1 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 29.8 snowfall days, and 15.75" (400mm) of snow is accumulated.Ocean temperature
In Boston, the average seawater temperature in October is 59.5°F (15.3°C).Note: For most individuals, swimming in 59.5°F (15.3°C) is not a pleasant experience. The difficulty in managing breathing increases as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in October is 11h and 3min.On the first day of the month, sunrise is at 6:42 am and sunset at 6:25 pm. On the last day of October, in Boston, sunrise is at 7:17 am and sunset at 5:38 pm EDT.
Sunshine
In October, the average sunshine is 6h.UV index
The average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 3 in October leads to these recommendations:
Ensure safety - Sun damage prevention is strongly urged. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Boston, MA
- Average high temperature in October: 61.5°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in October: 48.4°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in October
Boston, MA
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in October
Boston, MA
- Average wind speed in October: 8.3mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in October
Boston, MA
- Average humidity in October: 75%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in October
Boston, MA
- Average rainfall in October: 2.56"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in October
Boston, MA
- Average rainfall days in October: 13.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in October
Boston, MA
- Average snowfall in October: 0.12"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Boston, MA
- Average snowfall days in October: 0.1 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in October
Boston, MA
- Average sea temperature in October: 59.4°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in October /
Average sunshine in October
Boston, MA
- Average daylight in October: 11h and 0min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in October: 6h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in October
Boston, MA
- Average sunshine days in October: 15.7 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in October
Boston, MA
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in October
Boston, MA
- Average cloud cover in October: 44
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in October
Boston, MA
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
