October weather forecast and climate
Boston, MA

A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
A beautiful natural park with the George Washington Monument in Boston, Massachusetts, with a sneak view of the city skyscrapers
October, like September, in Boston, Massachusetts, is another enjoyable autumn month, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 48.4°F (9.1°C).

Temperature

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

Humidity

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

Rainfall

In Boston, during October, the rain falls for 13.3 days and regularly aggregates up to 2.56" (65mm) of precipitation. Throughout the year, there are 141.4 rainfall days, and 27.2" (691mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Boston are January through May, October through December. 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. In Boston, Massachusetts, during the entire year, snow falls for 29.8 days, and aggregates up to 15.75" (400mm) of snow.

Ocean temperature

In Boston, in October, 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

The average length of the day in October is 11h.

Sunshine

The average sunshine in Boston is 6h.

UV index

In Boston, the average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in October in Boston?

In October, the average high-temperature is 61.5°F (16.4°C), and the average low-temperature is 48.4°F (9.1°C).

What is the average humidity in October in Boston?

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

How much does it rain in Boston in October?

In October, in Boston, the rain falls for 13.3 days. Throughout October, 2.56" (65mm) of precipitation is accumulated.

When does it start to snow in Boston?

October is the first month it typically snows in Boston. 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 October, the average ocean temperature is 59.5°F (15.3°C). 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).

How many hours of daylight does Boston have in October?

In Boston, Massachusetts, the average length of the day in October is 11h.

How many hours of sunshine does Boston have in October?

In Boston, the average sunshine in October is 6h.

What is the UV index intensity in October in Boston?

In Boston, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in October - Boston, MA
  • Average high temperature in October: 16.4°C

The warmest month (with the highest average high temperature) is July (27.6°C).
The month with the lowest average high temperature is January (1.2°C).

  • Average low temperature in October: 9.1°C

The month with the highest average low temperature is July (18.3°C).
The coldest month (with the lowest average low temperature) is January (-5.2°C).

Average pressure in October - Boston, MA
  • Average pressure in October: 1016.1mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in October - Boston, MA
  • Average wind speed in October: 13.3km/h

The windiest month (with the highest average wind speed) is January (15.9km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).

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: 65mm

The wettest months (with the highest rainfall) are March, April and December (74mm).
The driest month (with the least rainfall) is September (32mm).

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: 3mm

The month with the highest snowfall is February (120mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in October - Boston, MA
  • Average snowfall days in October: 0.1 days

Months with the highest number of snowfall days are January and February (7.6 days).
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: 15.3°C

The best month for swimming (with the highest average sea temperature) is August (20°C).
The coldest month (with the lowest average sea temperature) is February (3.4°C).

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

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in October: 6h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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

Months with the highest UV index are June, July and August (UV index 6).
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: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).