October Weather in Boston, United States

Last updated: June 24, 2025

In October, the average temperature in Boston, United States is a comfortable 23°C (74°F). Temperatures can range from a chilly 5°C (41°F) to a warm 36°C (97°F). Visitors can expect 73 mm (2.9 in) of precipitation spread over 8 days, contributing to an average humidity level of 77%. Enjoy the diverse climate and natural beauty this destination has to offer!

October Temperature in Boston

In October in Boston, the average temperature is 23°C (74°F). Maximums can reach 36°C (97°F) and minimums can be as low as 5°C (41°F). This range makes Boston an ideal destination for travelers seeking warm days and cool evenings.

October Weather in Boston: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boston, October typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (41°F).

Data source: Temperature data for Boston generated using information from the Copernicus Climate Change Service.

October Precipitation in Boston

In Boston in October, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

October Precipitation Trends in Boston

The chart displays monthly precipitation patterns in Boston, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Boston, October typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in Boston

In Boston in October, humidity is 77%. With an average temperature of 23°C (74°F), this humidity feels like being enveloped in a warm, sticky blanket, making travel somewhat uncomfortable and requiring frequent hydration breaks to enjoy the sights without feeling overheated.

October Average Humidity in Boston

This chart illustrates the average monthly humidity levels in Boston, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Boston is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Boston

In Boston in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Boston.

Maximum UV Index Levels in Boston for October

The chart shows the monthly maximum UV Index (UVI) for Boston in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Boston typically reaches 8, which falls under the very high exposure category.

Data source: Boston October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How October Weather in Boston Compares to Other Months

Weather in Boston varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Boston, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Boston, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	72 mm (2.8 inches)	85%	moderate
February Weather	15°C (60°F)	96 mm (3.8 inches)	82%	very high
March Weather	17°C (64°F)	52 mm (2.1 inches)	80%	very high
April Weather	20°C (69°F)	80 mm (3.1 inches)	76%	very high
May Weather	25°C (76°F)	74 mm (2.9 inches)	73%	extreme
June Weather	27°C (80°F)	157 mm (6.2 inches)	74%	extreme
July Weather	27°C (81°F)	148 mm (5.8 inches)	80%	extreme
August Weather	27°C (82°F)	137 mm (5.4 inches)	79%	extreme
September Weather	26°C (80°F)	110 mm (4.3 inches)	83%	very high
October Weather	23°C (74°F)	73 mm (2.9 inches)	77%	very high
November Weather	16°C (61°F)	50 mm (2.0 inches)	84%	high
December Weather	13°C (56°F)	117 mm (4.6 inches)	88%	moderate