May Weather in Vashon, United States

Last updated: June 24, 2025

In May, the average temperature in Vashon, United States hovers around 14°C (57°F), with a minimum of 6°C (43°F) and a maximum reaching up to 26°C (80°F). Expect about 60 mm (2.4 in) of precipitation spread over 11 days, adding a touch of moisture to the air, which boasts an average humidity of 84%.

May Temperature in Vashon

In May in Vashon, the average temperature is 14°C (57°F), with maximums reaching 26°C (80°F) and minimums dropping as low as 6°C (43°F). This pleasant climate makes Vashon an ideal destination for outdoor activities and sightseeing during this time of year.

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

The chart illustrates May temperature patterns in Vashon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vashon, May typically has an average temperature of 14°C (57°F), with highs reaching up to 26°C (80°F) and lows dropping to around 6°C (43°F).

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

May Precipitation in Vashon

In Vashon in May, the precipitation amount is 60 mm (2.4 in) over the course of 11 days.

May Precipitation Trends in Vashon

The chart displays monthly precipitation patterns in Vashon, 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 Vashon, May typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Vashon

In Vashon in May, humidity is 84%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities feel stifling and requiring frequent breaks to cool off.

May Average Humidity in Vashon

This chart illustrates the average monthly humidity levels in Vashon, 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 Vashon is approximately 84%, 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 Vashon

In Vashon in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Vashon.

Maximum UV Index Levels in Vashon for May

The chart shows the monthly maximum UV Index (UVI) for Vashon 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 Vashon typically reaches 8, which falls under the very high exposure category.

Data source: Vashon 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 Vashon Compares to Other Months

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

This table compares monthly weather conditions in Vashon, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	160 mm (6.3 inches)	86%	low
February Weather	5°C (42°F)	142 mm (5.6 inches)	84%	moderate
March Weather	8°C (46°F)	109 mm (4.3 inches)	85%	moderate
April Weather	10°C (50°F)	97 mm (3.8 inches)	83%	high
May Weather	14°C (57°F)	60 mm (2.4 inches)	84%	very high
June Weather	17°C (62°F)	55 mm (2.2 inches)	84%	very high
July Weather	20°C (67°F)	17 mm (0.7 inches)	82%	very high
August Weather	20°C (68°F)	17 mm (0.7 inches)	73%	very high
September Weather	17°C (63°F)	84 mm (3.3 inches)	74%	high
October Weather	12°C (53°F)	128 mm (5.0 inches)	83%	moderate
November Weather	9°C (48°F)	161 mm (6.3 inches)	86%	low
December Weather	6°C (43°F)	177 mm (7.0 inches)	87%	low