May Weather in Scappoose, United States

Last updated: June 24, 2025

In Scappoose, United States, the average temperature in May is a comfortable 13°C (57°F). Be prepared for a minimum of 2°C (36°F) and the occasional maximum of 31°C (88°F). During this month, expect around 64 mm (2.5 in) of precipitation over approximately 9 days, with average humidity at a notable 83%.

May Temperature in Scappoose

In May in Scappoose, the average temperature is 13°C (57°F). Maximum temperatures can reach 31°C (88°F), while minimum temperatures can drop to as low as 2°C (36°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack accordingly for both warm days and cooler nights.

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

The chart illustrates May temperature patterns in Scappoose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Scappoose, May typically has an average temperature of 13°C (57°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (36°F).

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

May Precipitation in Scappoose

In Scappoose in May, the precipitation amount is 64 mm (2.5 in) over a span of 9 days.

May Precipitation Trends in Scappoose

The chart displays monthly precipitation patterns in Scappoose, 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 Scappoose, May typically receives around 64 mm (2.5 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 Scappoose

In Scappoose in May humidity is 83%. With an average temperature of 13°C (57°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities slightly uncomfortable and requiring a light jacket.

May Average Humidity in Scappoose

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

In Scappoose 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 Scappoose.

Maximum UV Index Levels in Scappoose for May

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

Data source: Scappoose 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 Scappoose Compares to Other Months

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

This table compares monthly weather conditions in Scappoose, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	176 mm (6.9 inches)	85%	low
February Weather	4°C (40°F)	163 mm (6.4 inches)	84%	moderate
March Weather	7°C (45°F)	140 mm (5.5 inches)	85%	moderate
April Weather	10°C (50°F)	119 mm (4.7 inches)	83%	high
May Weather	13°C (57°F)	64 mm (2.5 inches)	83%	very high
June Weather	16°C (62°F)	54 mm (2.1 inches)	83%	very high
July Weather	19°C (66°F)	8 mm (0.3 inches)	82%	very high
August Weather	20°C (68°F)	8 mm (0.3 inches)	74%	very high
September Weather	17°C (62°F)	74 mm (2.9 inches)	71%	high
October Weather	11°C (52°F)	107 mm (4.2 inches)	81%	moderate
November Weather	7°C (45°F)	166 mm (6.5 inches)	87%	moderate
December Weather	5°C (40°F)	186 mm (7.3 inches)	87%	low