May Weather in Pleasanton, United States

Last updated: June 24, 2025

In Pleasanton, United States, the average temperature in May hovers around 26°C (80°F), making it pleasantly warm. However, temperatures can swing from a chilly 11°C (53°F) to a sweltering 41°C (105°F). Expect about 103 mm (4.1 in) of precipitation spread across 12 days, coupled with a high average humidity of 81%. Stay prepared for both the heat and the occasional downpour!

May Temperature in Pleasanton

In May in Pleasanton, the average temperature is 26°C (80°F), with maximums reaching up to 41°C (105°F) and minimums dropping as low as 11°C (53°F). Be prepared for warm days and cooler nights when planning your travels.

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

The chart illustrates May temperature patterns in Pleasanton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pleasanton, May typically has an average temperature of 26°C (80°F), with highs reaching up to 41°C (105°F) and lows dropping to around 11°C (53°F).

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

May Precipitation in Pleasanton

In Pleasanton in May, the total precipitation amount is 103 mm (4.1 in), occurring over the course of 12 days.

May Precipitation Trends in Pleasanton

The chart displays monthly precipitation patterns in Pleasanton, 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 Pleasanton, May typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 12 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 Pleasanton

In Pleasanton in May, humidity is 81%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that clings to the skin, making outdoor activities feel more strenuous and requiring frequent breaks to stay refreshed and hydrated.

May Average Humidity in Pleasanton

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

In Pleasanton 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 Pleasanton.

Maximum UV Index Levels in Pleasanton for May

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

Data source: Pleasanton 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 Pleasanton Compares to Other Months

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

This table compares monthly weather conditions in Pleasanton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	32 mm (1.3 inches)	79%	moderate
February Weather	14°C (58°F)	46 mm (1.8 inches)	79%	very high
March Weather	20°C (67°F)	53 mm (2.1 inches)	74%	very high
April Weather	22°C (73°F)	52 mm (2.0 inches)	76%	extreme
May Weather	26°C (80°F)	103 mm (4.1 inches)	81%	extreme
June Weather	29°C (85°F)	64 mm (2.5 inches)	76%	extreme
July Weather	30°C (87°F)	72 mm (2.8 inches)	66%	extreme
August Weather	31°C (88°F)	52 mm (2.1 inches)	58%	extreme
September Weather	28°C (82°F)	108 mm (4.3 inches)	65%	extreme
October Weather	23°C (74°F)	76 mm (3.0 inches)	74%	very high
November Weather	17°C (64°F)	43 mm (1.7 inches)	81%	high
December Weather	14°C (58°F)	43 mm (1.7 inches)	86%	moderate