May Weather in Acton, United States

Last updated: June 24, 2025

In May, the average temperature in Acton, United States is a pleasant 17°C (64°F). Expect a range from a cool 4°C (40°F) to a warm 33°C (92°F). During this month, there is a modest precipitation of 13 mm (0.5 in), typically spread over 2 days, contributing to an average humidity of 57% that enhances the region's lush, vibrant atmosphere.

May Temperature in Acton

In May in Acton, the average temperature is 17°C (64°F), with maximums reaching up to 33°C (92°F) and minimums dipping down to 4°C (40°F). This variation makes it important for travelers to pack accordingly to enjoy their stay comfortably.

May Weather in Acton: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Acton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Acton, May typically has an average temperature of 17°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).

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

May Precipitation in Acton

In Acton in May, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.

May Precipitation Trends in Acton

The chart displays monthly precipitation patterns in Acton, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Acton, May typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Acton

In Acton in May, humidity is 57%. With an average temperature of 17°C (64°F), this humidity feels like a refreshing embrace, making it quite pleasant for traveling as long as you stay hydrated and enjoy the mild air.

May Average Humidity in Acton

This chart illustrates the average monthly humidity levels in Acton, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Acton is approximately 57%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Acton

In Acton in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Acton.

Maximum UV Index Levels in Acton for May

The chart shows the monthly maximum UV Index (UVI) for Acton in May, 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 May, the maximum UV index in Acton typically reaches 11, which falls under the extreme exposure category.

Data source: Acton May 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 May Weather in Acton Compares to Other Months

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

This table compares monthly weather conditions in Acton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	58 mm (2.3 inches)	78%	moderate
February Weather	10°C (50°F)	53 mm (2.1 inches)	82%	high
March Weather	11°C (53°F)	73 mm (2.9 inches)	75%	very high
April Weather	15°C (60°F)	22 mm (0.9 inches)	68%	very high
May Weather	17°C (64°F)	13 mm (0.5 inches)	57%	extreme
June Weather	22°C (72°F)	3 mm (0.1 inches)	52%	extreme
July Weather	25°C (78°F)	4 mm (0.2 inches)	46%	extreme
August Weather	25°C (78°F)	6 mm (0.2 inches)	39%	extreme
September Weather	23°C (73°F)	6 mm (0.3 inches)	48%	very high
October Weather	18°C (65°F)	7 mm (0.3 inches)	59%	high
November Weather	14°C (57°F)	20 mm (0.8 inches)	72%	moderate
December Weather	9°C (49°F)	65 mm (2.6 inches)	76%	moderate