August Weather in Williamstown, United States

Last updated: June 24, 2025

In Williamstown, United States, the average temperature in August hovers around 20°C (69°F). Visitors can expect a minimum of 6°C (43°F) and a maximum of 32°C (90°F). Be prepared for some rain, as precipitation totals approximately 103 mm (4.0 in) over 12 days, accompanied by an average humidity of 64%.

August Temperature in Williamstown

In August in Williamstown, the average temperature is 20°C (69°F), with maximums reaching 32°C (90°F) and minimums dropping as low as 6°C (43°F). This climate makes it an ideal time for travelers to enjoy outdoor activities while being prepared for varying temperatures.

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

The chart illustrates August 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, August typically has an average temperature of 20°C (69°F), with highs reaching up to 32°C (90°F) and lows dropping to around 6°C (43°F).

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

August Precipitation in Williamstown

In Williamstown in August, the precipitation amount is 103 mm (4.0 in) recorded over a span of 12 days.

August Precipitation Trends in Williamstown

The chart displays monthly precipitation patterns in Williamstown, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Williamstown, August typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Williamstown

In Williamstown in August, humidity is 64%. With an average temperature of 20°C (69°F), this humidity feels like a warm, slightly sticky embrace that can leave travelers feeling a bit sluggish. It's essential to stay hydrated and take breaks in the shade while exploring, as the moisture in the air can make outdoor activities feel more intense.

August Average Humidity in Williamstown

This chart illustrates the average monthly humidity levels in Williamstown, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Williamstown is approximately 64%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Williamstown

In Williamstown in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Williamstown.

Maximum UV Index Levels in Williamstown for August

The chart shows the monthly maximum UV Index (UVI) for Williamstown in August, 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 August, the maximum UV index in Williamstown typically reaches 9, which falls under the very high exposure category.

Data source: Williamstown August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	86 mm (3.4 inches)	89%	moderate
February Weather	-3°C (26°F)	105 mm (4.1 inches)	88%	moderate
March Weather	0°C (32°F)	94 mm (3.7 inches)	86%	high
April Weather	7°C (44°F)	136 mm (5.4 inches)	84%	very high
May Weather	13°C (56°F)	110 mm (4.3 inches)	76%	very high
June Weather	18°C (65°F)	90 mm (3.5 inches)	72%	very high
July Weather	21°C (71°F)	130 mm (5.1 inches)	66%	very high
August Weather	20°C (69°F)	103 mm (4.0 inches)	64%	very high
September Weather	17°C (62°F)	105 mm (4.1 inches)	72%	high
October Weather	10°C (51°F)	155 mm (6.1 inches)	81%	high
November Weather	2°C (37°F)	113 mm (4.5 inches)	87%	moderate
December Weather	-2°C (28°F)	115 mm (4.5 inches)	84%	low