May Weather in Sunnyside, United States

Last updated: June 24, 2025

In May, the average temperature in Sunnyside, United States is a comfortable 18°C (65°F). However, temperatures can vary significantly, with a minimum of 3°C (38°F) and a maximum reaching up to 36°C (97°F). Visitors can expect 16 mm (0.6 in) of precipitation spread over 4 days, and a relatively high average humidity of 81%.

May Temperature in Sunnyside

In May in Sunnyside, the average temperature is 18°C (65°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop as low as 3°C (38°F). It's an ideal time for travelers to enjoy a mix of warm days and cooler nights, so packing accordingly is essential.

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

The chart illustrates May temperature patterns in Sunnyside, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sunnyside, May typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (97°F) and lows dropping to around 3°C (38°F).

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

May Precipitation in Sunnyside

In Sunnyside in May, the precipitation amount is 16 mm (0.6 in) over a span of 4 days.

May Precipitation Trends in Sunnyside

The chart displays monthly precipitation patterns in Sunnyside, 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 Sunnyside, May typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 4 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 Sunnyside

In Sunnyside in May, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

May Average Humidity in Sunnyside

This chart illustrates the average monthly humidity levels in Sunnyside, 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 Sunnyside is approximately 81%, 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 Sunnyside

In Sunnyside 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 Sunnyside.

Maximum UV Index Levels in Sunnyside for May

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

Data source: Sunnyside 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 Sunnyside Compares to Other Months

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

This table compares monthly weather conditions in Sunnyside, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	43 mm (1.7 inches)	86%	low
February Weather	2°C (36°F)	43 mm (1.7 inches)	86%	moderate
March Weather	7°C (45°F)	25 mm (1.0 inches)	87%	moderate
April Weather	12°C (54°F)	24 mm (1.0 inches)	84%	high
May Weather	18°C (65°F)	16 mm (0.6 inches)	81%	very high
June Weather	23°C (73°F)	7 mm (0.3 inches)	82%	very high
July Weather	27°C (80°F)	1 mm (0.0 inches)	79%	very high
August Weather	26°C (79°F)	5 mm (0.2 inches)	63%	very high
September Weather	20°C (68°F)	9 mm (0.4 inches)	62%	high
October Weather	12°C (53°F)	26 mm (1.0 inches)	83%	moderate
November Weather	5°C (42°F)	31 mm (1.2 inches)	89%	moderate
December Weather	1°C (35°F)	35 mm (1.4 inches)	88%	low