May Weather in Arroyo Grande, United States

Last updated: June 24, 2025

In May, the average temperature in Arroyo Grande, United States hovers around 14°C (58°F), with a comfortable range from a cool 8°C (46°F) to a pleasant 23°C (75°F). Expect 12 mm (0.5 in) of precipitation spread over 2 days, contributing to an average humidity of 75%. Perfect for those who appreciate a mild climate!

May Temperature in Arroyo Grande

In May in Arroyo Grande, the average temperature is 14°C (58°F). The maximum can reach 23°C (75°F), while the minimum can drop to 8°C (46°F). It's a great time to explore Arroyo Grande comfortably, as the mild weather is perfect for outdoor activities and sightseeing.

May Weather in Arroyo Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Arroyo Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arroyo Grande, May typically has an average temperature of 14°C (58°F), with highs reaching up to 23°C (75°F) and lows dropping to around 8°C (46°F).

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

May Precipitation in Arroyo Grande

In Arroyo Grande in May, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

May Precipitation Trends in Arroyo Grande

The chart displays monthly precipitation patterns in Arroyo Grande, 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 Arroyo Grande, May typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 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 Arroyo Grande

In Arroyo Grande in May humidity is 75%. With an average temperature of 14°C (58°F), this humidity feels like a lingering blanket of warmth, making travel both refreshing and a bit stifling, as the moisture in the air may leave you feeling slightly sticky while enjoying outdoor adventures.

May Average Humidity in Arroyo Grande

This chart illustrates the average monthly humidity levels in Arroyo Grande, 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 Arroyo Grande is approximately 75%, 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 Arroyo Grande

In Arroyo Grande in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Arroyo Grande.

Maximum UV Index Levels in Arroyo Grande for May

The chart shows the monthly maximum UV Index (UVI) for Arroyo Grande 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 Arroyo Grande typically reaches 11, which falls under the extreme exposure category.

Data source: Arroyo Grande 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 Arroyo Grande Compares to Other Months

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

This table compares monthly weather conditions in Arroyo Grande, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	100 mm (3.9 inches)	80%	moderate
February Weather	12°C (53°F)	81 mm (3.2 inches)	83%	high
March Weather	12°C (54°F)	88 mm (3.5 inches)	80%	very high
April Weather	13°C (57°F)	24 mm (1.0 inches)	76%	very high
May Weather	14°C (58°F)	12 mm (0.5 inches)	75%	extreme
June Weather	16°C (61°F)	2 mm (0.1 inches)	74%	extreme
July Weather	18°C (64°F)	1 mm (0.0 inches)	75%	extreme
August Weather	18°C (65°F)	1 mm (0.0 inches)	72%	extreme
September Weather	18°C (64°F)	1 mm (0.1 inches)	70%	very high
October Weather	17°C (63°F)	10 mm (0.4 inches)	70%	high
November Weather	14°C (58°F)	33 mm (1.3 inches)	74%	moderate
December Weather	12°C (54°F)	72 mm (2.8 inches)	76%	moderate