May Weather in Wilsonville, United States

Last updated: June 24, 2025

In May, the average temperature in Wilsonville, United States hovers around 15°C (58°F). Expect a minimum chill of 2°C (36°F) and a possible warm peak at 32°C (90°F). With 54 mm (2.1 in) of precipitation spread over 9 days, staying dry may require an umbrella. The air remains notably humid, with an average humidity of 83%, creating a lively atmosphere throughout the month.

May Temperature in Wilsonville

In May in Wilsonville, the average temperature is 15°C (58°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as 2°C (36°F). This diverse temperature range makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates May temperature patterns in Wilsonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wilsonville, May typically has an average temperature of 15°C (58°F), with highs reaching up to 32°C (90°F) and lows dropping to around 2°C (36°F).

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

May Precipitation in Wilsonville

In Wilsonville in May, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.

May Precipitation Trends in Wilsonville

The chart displays monthly precipitation patterns in Wilsonville, 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 Wilsonville, May typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 9 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 Wilsonville

In Wilsonville in May, humidity is 83%. With an average temperature of 15°C (58°F), this humidity feels like a warm blanket enveloping you, making outdoor activities sticky and uncomfortable for traveling.

May Average Humidity in Wilsonville

This chart illustrates the average monthly humidity levels in Wilsonville, 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 Wilsonville is approximately 83%, 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 Wilsonville

In Wilsonville in May, 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 Wilsonville.

Maximum UV Index Levels in Wilsonville for May

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

Data source: Wilsonville 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 Wilsonville Compares to Other Months

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

This table compares monthly weather conditions in Wilsonville, 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)	156 mm (6.1 inches)	85%	low
February Weather	5°C (42°F)	178 mm (7.0 inches)	84%	moderate
March Weather	8°C (47°F)	131 mm (5.2 inches)	85%	moderate
April Weather	11°C (52°F)	115 mm (4.5 inches)	83%	high
May Weather	15°C (58°F)	54 mm (2.1 inches)	83%	very high
June Weather	18°C (65°F)	43 mm (1.7 inches)	83%	very high
July Weather	21°C (71°F)	4 mm (0.2 inches)	82%	very high
August Weather	22°C (71°F)	6 mm (0.3 inches)	74%	very high
September Weather	18°C (65°F)	59 mm (2.3 inches)	71%	high
October Weather	12°C (54°F)	101 mm (4.0 inches)	81%	moderate
November Weather	8°C (47°F)	146 mm (5.7 inches)	87%	moderate
December Weather	5°C (42°F)	184 mm (7.3 inches)	87%	low