May Weather in Williamstown, United States

Last updated: June 24, 2025

In May, the average temperature in Williamstown, United States is a comfortable 17°C (62°F). However, be prepared for a range, as temperatures can dip to a chilly -1°C (31°F) or soar to a warm 32°C (90°F). Expect about 127 mm (5.0 in) of precipitation over 14 days, contributing to an average humidity level of 75%. Whether you're packing for warmth or planning for rainy days, it's essential to be ready for all this month has to offer!

May Temperature in Williamstown

In May in Williamstown, the average temperature is 17°C (62°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as -1°C (31°F). Be sure to pack for a range of temperatures to enjoy your travels comfortably.

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

The chart illustrates May temperature patterns in Williamstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamstown, May typically has an average temperature of 17°C (62°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (31°F).

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

May Precipitation in Williamstown

In Williamstown in May, the total precipitation amount is 127 mm (5.0 in), occurring over the course of 14 days.

May Precipitation Trends in Williamstown

The chart displays monthly precipitation patterns in Williamstown, 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 Williamstown, May typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 14 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 Williamstown

In Williamstown in May, humidity is 75%. With an average temperature of 17°C (62°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and a bit sluggish as they navigate the sights.

May Average Humidity in Williamstown

This chart illustrates the average monthly humidity levels in Williamstown, 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 Williamstown is approximately 75%, 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 Williamstown

In Williamstown in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Williamstown.

Maximum UV Index Levels in Williamstown for May

The chart shows the monthly maximum UV Index (UVI) for Williamstown 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 Williamstown typically reaches 10, which falls under the very high exposure category.

Data source: Williamstown 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 Williamstown Compares to Other Months

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

This table compares monthly weather conditions in Williamstown, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	74 mm (2.9 inches)	87%	moderate
February Weather	1°C (35°F)	107 mm (4.2 inches)	85%	moderate
March Weather	5°C (41°F)	98 mm (3.8 inches)	85%	high
April Weather	11°C (52°F)	110 mm (4.4 inches)	83%	very high
May Weather	17°C (62°F)	127 mm (5.0 inches)	75%	very high
June Weather	21°C (71°F)	106 mm (4.2 inches)	73%	very high
July Weather	25°C (76°F)	152 mm (6.0 inches)	65%	very high
August Weather	23°C (74°F)	140 mm (5.5 inches)	62%	very high
September Weather	20°C (68°F)	115 mm (4.5 inches)	66%	very high
October Weather	14°C (58°F)	114 mm (4.5 inches)	79%	high
November Weather	6°C (43°F)	98 mm (3.9 inches)	87%	moderate
December Weather	2°C (36°F)	94 mm (3.7 inches)	85%	low