October weather forecast
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts
A beautiful natural park with the George Washington Monument in Boston, Massachusetts

Weather in October

October, the same as September, is another comfortable autumn month in Boston, Massachusetts, with an average temperature varying between 61.5°F (16.4°C) and 48.4°F (9.1°C).

Temperature

In Boston, the average high-temperature in October decreases from an agreeable 72.7°F (22.6°C) in September to a comfortable 61.5°F (16.4°C). The average low-temperature, in October, is 48.4°F (9.1°C).

Humidity

The average relative humidity in October in Boston is 75%.

Rainfall

In October, in Boston, 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

Months with snowfall are January through May, October through December. 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 water temperature is 59.5°F (15.3°C).
Note: For swimming, a surface water temperature of 59.5°F (15.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

In October, the average length of the day is 11h and 3min.
On the first day of October in Boston, sunrise is at 6:41 am and sunset at 6:26 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:39 pm EDT.

Sunshine

The average sunshine in October in Boston is 6h.

UV index

The average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in October transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in October in Boston?

In October, the average relative humidity in Boston is 75%.

How much does it rain in Boston in October?

In Boston, Massachusetts, in October, it is raining for 13.3 days, with typically 2.56" (65mm) of accumulated precipitation.

When does it start snowing in Boston?

October is the first month it typically snows in Boston, Massachusetts. Throughout October, in the average 0.1 snowfall days, it receives 0.12" (3mm) of snow.

How cold is the water in October in Boston?

In Boston, Massachusetts, the average seawater temperature in October is 59.5°F (15.3°C). For most, swimming in 59.5°F (15.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in October in Boston?

In Boston, the average day length in October is 11h and 3min.

What time are sunrise and sunset in October in Boston?

On the first day of October in Boston, sunrise is at 6:41 am and sunset at 6:26 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:39 pm EDT.

How many hours of sunshine does Boston have in October?

The average sunshine duration in October in Boston, Massachusetts, is 6h.

What is the UV index intensity in October in Boston?

The average daily maximum UV index in October in Boston is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Boston, MA

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).

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Average pressure in October
Boston, MA

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).

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Average wind speed in October
Boston, MA

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).

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Average humidity in October
Boston, MA

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%).

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Average rainfall in October
Boston, MA

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").

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Average rainfall days in October
Boston, MA

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).

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Average snowfall in October
Boston, MA

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").

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Average snowfall days in October
Boston, MA

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).

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Average sea temperature in October
Boston, MA

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).

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Average daylight in October /
Average sunshine in October
Boston, MA

Average daylight in October / Average sunshine in October - Boston, MA
  • Average daylight in October: 11h and 3min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • 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).

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Average sunshine days in October
Boston, MA

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).

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Average UV index in October
Boston, MA

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).

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Average cloud cover in October
Boston, MA

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).

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Average visibility in October
Boston, MA

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).

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