August Weather in Monterey, United States

Last updated: June 24, 2025

In Monterey, United States, the average temperature in August hovers around 20°C (68°F). Expect a comfortable range, with minimums dipping to 9°C (49°F) and maximums reaching up to 30°C (87°F). However, be prepared for precipitation as you might encounter about 129 mm (5.1 in) over 14 days, paired with an average humidity of 59%. Enjoy the mix of conditions that August brings!

August Temperature in Monterey

In August in Monterey, the average temperature is 20°C (68°F). Maximums can reach 30°C (87°F) and minimums can be as low as 9°C (49°F). It's a pleasant time to visit, offering a comfortable climate for outdoor activities and exploration.

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

The chart illustrates August temperature patterns in Monterey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monterey, August typically has an average temperature of 20°C (68°F), with highs reaching up to 30°C (87°F) and lows dropping to around 9°C (49°F).

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

August Precipitation in Monterey

In Monterey in August, the precipitation amount is 129 mm (5.1 in) over the course of 14 days.

August Precipitation Trends in Monterey

The chart displays monthly precipitation patterns in Monterey, 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 Monterey, August typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 14 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 Monterey

In Monterey in August, humidity is 59%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, creating a slightly muggy atmosphere that can be a bit stifling for outdoor activities, yet refreshing during cooler, shaded moments, making it ideal for leisurely sightseeing and exploration in the early mornings or late afternoons.

August Average Humidity in Monterey

This chart illustrates the average monthly humidity levels in Monterey, 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 Monterey is approximately 59%, 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 Monterey

In Monterey 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 Monterey.

Maximum UV Index Levels in Monterey for August

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

Data source: Monterey 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 Monterey Compares to Other Months

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

This table compares monthly weather conditions in Monterey, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	76 mm (3.0 inches)	86%	moderate
February Weather	2°C (36°F)	115 mm (4.5 inches)	86%	high
March Weather	5°C (41°F)	86 mm (3.4 inches)	86%	very high
April Weather	10°C (50°F)	126 mm (5.0 inches)	84%	very high
May Weather	15°C (60°F)	151 mm (5.9 inches)	78%	extreme
June Weather	19°C (66°F)	107 mm (4.2 inches)	79%	extreme
July Weather	21°C (70°F)	86 mm (3.4 inches)	70%	extreme
August Weather	20°C (68°F)	129 mm (5.1 inches)	59%	very high
September Weather	17°C (64°F)	117 mm (4.6 inches)	68%	very high
October Weather	12°C (54°F)	115 mm (4.5 inches)	80%	high
November Weather	4°C (40°F)	72 mm (2.8 inches)	86%	moderate
December Weather	2°C (35°F)	96 mm (3.8 inches)	85%	moderate