May Weather in Gilroy, United States

Last updated: June 24, 2025

In May, the average temperature in Gilroy, United States is a pleasant 15°C (60°F). Visitors can expect a range with minimum temperatures dropping to 4°C (40°F) and highs reaching up to 31°C (89°F). Expect a modest precipitation amount of 15 mm (0.6 in) spread over 2 days, paired with an average humidity level of 71%.

May Temperature in Gilroy

In May in Gilroy, the average temperature is 15°C (60°F), with maximums reaching as high as 31°C (89°F) and minimums dropping to as low as 4°C (40°F). This diverse weather makes it essential for travelers to pack layers to comfortably enjoy their visit.

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

The chart illustrates May temperature patterns in Gilroy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gilroy, May typically has an average temperature of 15°C (60°F), with highs reaching up to 31°C (89°F) and lows dropping to around 4°C (40°F).

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

May Precipitation in Gilroy

In Gilroy in May, the precipitation amount is 15 mm (0.6 in) over the course of 2 days.

May Precipitation Trends in Gilroy

The chart displays monthly precipitation patterns in Gilroy, 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 Gilroy, May typically receives around 15 mm (0.6 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 Gilroy

In Gilroy in May humidity is 71%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket wrapped around you, making travel slightly uncomfortable as you feel sticky and sluggish.

May Average Humidity in Gilroy

This chart illustrates the average monthly humidity levels in Gilroy, 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 Gilroy is approximately 71%, 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 Gilroy

In Gilroy 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 Gilroy.

Maximum UV Index Levels in Gilroy for May

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

Data source: Gilroy 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 Gilroy Compares to Other Months

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

This table compares monthly weather conditions in Gilroy, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	103 mm (4.0 inches)	82%	moderate
February Weather	11°C (52°F)	79 mm (3.1 inches)	84%	moderate
March Weather	12°C (53°F)	73 mm (2.9 inches)	82%	very high
April Weather	14°C (57°F)	26 mm (1.0 inches)	78%	very high
May Weather	15°C (60°F)	15 mm (0.6 inches)	71%	extreme
June Weather	18°C (65°F)	1 mm (0.0 inches)	64%	extreme
July Weather	19°C (67°F)	1 mm (0.0 inches)	58%	extreme
August Weather	20°C (68°F)	1 mm (0.0 inches)	54%	very high
September Weather	19°C (67°F)	2 mm (0.1 inches)	55%	very high
October Weather	17°C (62°F)	17 mm (0.7 inches)	62%	high
November Weather	13°C (55°F)	30 mm (1.2 inches)	78%	moderate
December Weather	10°C (50°F)	79 mm (3.1 inches)	80%	moderate