July Weather in Somerville, United States

Last updated: June 24, 2025

In July, the average temperature in Somerville, United States is a warm 29°C (85°F), with daily variations ranging from a cool minimum of 18°C (65°F) to a sizzling maximum of 40°C (105°F). Expect some moisture, as precipitation amounts to 96 mm (3.8 in) over approximately 10 days. The air holds a pleasant humidity level of 71%, making it a typical tropical climate experience.

July Temperature in Somerville

In July in Somerville, the average temperature is 29°C (85°F). Maximums can reach 40°C (105°F), while minimums can drop to as low as 18°C (65°F). Be sure to pack accordingly to enjoy your travels to Somerville during this warm period!

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

The chart illustrates July 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, July typically has an average temperature of 29°C (85°F), with highs reaching up to 40°C (105°F) and lows dropping to around 18°C (65°F).

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

July Precipitation in Somerville

In Somerville in July, the total precipitation amount is 96 mm (3.8 in) over a span of 10 days.

July Precipitation Trends in Somerville

The chart displays monthly precipitation patterns in Somerville, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Somerville, July typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Somerville

In Somerville in July humidity is 71%. With an average temperature of 29°C (85°F), this humidity feels like walking through a warm, damp blanket, making travel uncomfortable and sticky, and often leading to a desire for frequent breaks in shaded or air-conditioned spots.

July Average Humidity in Somerville

This chart illustrates the average monthly humidity levels in Somerville, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Somerville is approximately 71%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Somerville

In Somerville in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Somerville.

Maximum UV Index Levels in Somerville for July

The chart shows the monthly maximum UV Index (UVI) for Somerville in July, 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 July, the maximum UV index in Somerville typically reaches 12, which falls under the extreme exposure category.

Data source: Somerville July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	70 mm (2.8 inches)	79%	moderate
February Weather	13°C (55°F)	81 mm (3.2 inches)	80%	very high
March Weather	18°C (65°F)	69 mm (2.7 inches)	78%	very high
April Weather	20°C (69°F)	111 mm (4.4 inches)	79%	extreme
May Weather	25°C (77°F)	166 mm (6.5 inches)	81%	extreme
June Weather	28°C (83°F)	118 mm (4.7 inches)	77%	extreme
July Weather	29°C (85°F)	96 mm (3.8 inches)	71%	extreme
August Weather	30°C (86°F)	120 mm (4.7 inches)	67%	extreme
September Weather	27°C (81°F)	125 mm (4.9 inches)	69%	extreme
October Weather	22°C (72°F)	95 mm (3.7 inches)	73%	very high
November Weather	16°C (61°F)	72 mm (2.8 inches)	82%	high
December Weather	13°C (56°F)	103 mm (4.0 inches)	87%	moderate