August Weather in Gilroy, United States

Last updated: June 24, 2025

In Gilroy, United States, the average temperature in August hovers around 20°C (68°F). Expect a range from a cool 12°C (53°F) to a sizzling 38°C (100°F). With just 1 mm (0.0 in) of precipitation over 0 days, you can enjoy relatively dry conditions. Additionally, the average humidity stands at a comfortable 54%, making it a pleasant time to visit!

August Temperature in Gilroy

In August in Gilroy, the average temperature is 20°C (68°F), with maximums reaching up to 38°C (100°F) and minimums dropping as low as 12°C (53°F). Be prepared for warm weather and occasional chills when traveling during this month.

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

The chart illustrates August 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, August typically has an average temperature of 20°C (68°F), with highs reaching up to 38°C (100°F) and lows dropping to around 12°C (53°F).

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

August Precipitation in Gilroy

In Gilroy in August, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

August Precipitation Trends in Gilroy

The chart displays monthly precipitation patterns in Gilroy, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Gilroy, August typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Gilroy

In Gilroy in August, humidity is 54%. With an average temperature of 20°C (68°F), this humidity feels like a pleasant embrace, making it quite comfortable for traveling and exploring the surroundings.

August Average Humidity in Gilroy

This chart illustrates the average monthly humidity levels in Gilroy, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Gilroy is approximately 54%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Gilroy

In Gilroy in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Gilroy.

Maximum UV Index Levels in Gilroy for August

The chart shows the monthly maximum UV Index (UVI) for Gilroy in August, 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 August, the maximum UV index in Gilroy typically reaches 10, which falls under the very high exposure category.

Data source: Gilroy August 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 August 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 August’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 August’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