August Weather in Arroyo Grande, United States

Last updated: June 24, 2025

In Arroyo Grande, United States, the average temperature in August hovers around 18°C (65°F), creating a pleasant climate for outdoor activities. However, temperatures can dip to a minimum of 13°C (55°F) and soar to a maximum of 29°C (85°F). Expect minimal precipitation, with only 1 mm (0.0 in) falling over 0 days, and enjoy a comfortable average humidity of 72%.

August Temperature in Arroyo Grande

In August in Arroyo Grande, the average temperature is 18°C (65°F). The maximum can reach 29°C (85°F), while the minimum can drop as low as 13°C (55°F). This pleasant climate makes Arroyo Grande an ideal destination for outdoor activities and leisurely exploration during this time of year.

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

The chart illustrates August 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, August typically has an average temperature of 18°C (65°F), with highs reaching up to 29°C (85°F) and lows dropping to around 13°C (55°F).

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

August Precipitation in Arroyo Grande

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

August Precipitation Trends in Arroyo Grande

The chart displays monthly precipitation patterns in Arroyo Grande, 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 Arroyo Grande, 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 Arroyo Grande

In Arroyo Grande in August humidity is 72%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace, making traveling somewhat uncomfortable as the air clings to your skin and the heat can be stifling, yet it's perfect for enjoying leisurely strolls under the shade.

August Average Humidity in Arroyo Grande

This chart illustrates the average monthly humidity levels in Arroyo Grande, 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 Arroyo Grande is approximately 72%, 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 Arroyo Grande

In Arroyo Grande in August, 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 August

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

Data source: Arroyo Grande 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 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 August’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 August’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