May Weather in Siletz, United States

Last updated: June 24, 2025

In May, the average temperature in Siletz, United States hovers around 11°C (52°F). Expect a minimum of 4°C (40°F) and a maximum of 21°C (71°F), making it a mild time of year. However, be prepared for some moisture, as the region sees about 74 mm (2.9 in) of precipitation over 10 days. With an average humidity of 83%, it's a great idea to pack accordingly!

May Temperature in Siletz

In May in Siletz, the average temperature is 11°C (52°F). The maximum can reach 21°C (71°F) and the minimum can be as low as 4°C (40°F). This mild climate makes Siletz an ideal destination for travelers looking to enjoy outdoor activities without extreme temperatures.

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

The chart illustrates May temperature patterns in Siletz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siletz, May typically has an average temperature of 11°C (52°F), with highs reaching up to 21°C (71°F) and lows dropping to around 4°C (40°F).

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

May Precipitation in Siletz

In Siletz in May, the precipitation amount is 74 mm (2.9 in) spread over a period of 10 days.

May Precipitation Trends in Siletz

The chart displays monthly precipitation patterns in Siletz, 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 Siletz, May typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 10 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 Siletz

In Siletz in May humidity is 83%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, often leading travelers to seek shelter indoors or to dress in layered clothing to stay warm while exploring the area.

May Average Humidity in Siletz

This chart illustrates the average monthly humidity levels in Siletz, 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 Siletz 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 Siletz

In Siletz 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 Siletz.

Maximum UV Index Levels in Siletz for May

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

Data source: Siletz 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 Siletz Compares to Other Months

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

This table compares monthly weather conditions in Siletz, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	271 mm (10.7 inches)	85%	low
February Weather	7°C (44°F)	248 mm (9.8 inches)	84%	moderate
March Weather	8°C (46°F)	191 mm (7.5 inches)	85%	high
April Weather	9°C (49°F)	158 mm (6.2 inches)	83%	high
May Weather	11°C (52°F)	74 mm (2.9 inches)	83%	very high
June Weather	13°C (56°F)	62 mm (2.4 inches)	83%	very high
July Weather	15°C (58°F)	9 mm (0.4 inches)	82%	very high
August Weather	15°C (59°F)	13 mm (0.5 inches)	74%	very high
September Weather	14°C (58°F)	71 mm (2.8 inches)	71%	high
October Weather	12°C (54°F)	151 mm (5.9 inches)	81%	moderate
November Weather	10°C (50°F)	254 mm (10.0 inches)	87%	moderate
December Weather	8°C (46°F)	292 mm (11.5 inches)	87%	low