October Weather in Somerville, United States

Last updated: June 24, 2025

In Somerville, United States, the average temperature in October is a pleasant 19°C (66°F). However, be prepared for a temperature range that could dip to a chilly 1°C (35°F) or soar up to a scorching 36°C (98°F). During this month, precipitation averages at 130 mm (5.1 in) across about 10 days, and the average humidity hovers around 74%, making for a moderately humid climate.

October Temperature in Somerville

In October in Somerville, the average temperature is 19°C (66°F). Maximum temperatures can reach 36°C (98°F), while minimums can drop as low as 1°C (35°F). Be prepared for a wide range of temperatures when traveling to Somerville this month.

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

The chart illustrates October temperature patterns in Somerville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Somerville, October typically has an average temperature of 19°C (66°F), with highs reaching up to 36°C (98°F) and lows dropping to around 1°C (35°F).

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

October Precipitation in Somerville

In Somerville in October, the precipitation amount is 130 mm (5.1 in) over a period of 10 days.

October Precipitation Trends in Somerville

The chart displays monthly precipitation patterns in Somerville, 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 Somerville, October typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Somerville

In Somerville in October humidity is 74%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it ideal for leisurely outdoor exploration but potentially heavy for those not accustomed to tropical conditions.

October Average Humidity in Somerville

This chart illustrates the average monthly humidity levels in Somerville, 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 Somerville is approximately 74%, 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 Somerville

In Somerville in October, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Somerville.

Maximum UV Index Levels in Somerville for October

The chart shows the monthly maximum UV Index (UVI) for Somerville 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 Somerville typically reaches 7, which falls under the high exposure category.

Data source: Somerville 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 Somerville Compares to Other Months

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

This table compares monthly weather conditions in Somerville, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	114 mm (4.5 inches)	87%	moderate
February Weather	10°C (50°F)	180 mm (7.1 inches)	87%	high
March Weather	13°C (56°F)	190 mm (7.5 inches)	85%	very high
April Weather	16°C (62°F)	148 mm (5.8 inches)	82%	very high
May Weather	22°C (72°F)	103 mm (4.0 inches)	83%	very high
June Weather	25°C (77°F)	138 mm (5.4 inches)	82%	extreme
July Weather	27°C (81°F)	114 mm (4.5 inches)	78%	extreme
August Weather	26°C (80°F)	114 mm (4.5 inches)	67%	very high
September Weather	24°C (76°F)	115 mm (4.5 inches)	64%	very high
October Weather	19°C (66°F)	130 mm (5.1 inches)	74%	high
November Weather	11°C (51°F)	75 mm (2.9 inches)	87%	high
December Weather	9°C (48°F)	157 mm (6.2 inches)	88%	moderate