August Weather in Fallbrook, United States

Last updated: June 24, 2025

In August, the average temperature in Fallbrook, United States hovers around 25°C (77°F), offering a pleasant climate. However, be prepared for temperature variations, as the minimum can drop to 16°C (61°F), while the maximum can soar to 37°C (99°F). With only 3 mm (0.1 in) of precipitation expected over just 1 day, you can enjoy the outdoors without much interruption. Don't forget to stay hydrated, as the average humidity levels sit at a comfortable 42%.

August Temperature in Fallbrook

In August in Fallbrook, the average temperature is 25°C (77°F), with daytime highs reaching up to 37°C (99°F) and nighttime lows dropping to as low as 16°C (61°F). This mild climate makes Fallbrook an ideal destination for travelers looking to enjoy pleasant weather and outdoor activities.

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

The chart illustrates August temperature patterns in Fallbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fallbrook, August typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 16°C (61°F).

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

August Precipitation in Fallbrook

In Fallbrook in August, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

August Precipitation Trends in Fallbrook

The chart displays monthly precipitation patterns in Fallbrook, 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 Fallbrook, August typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 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 Fallbrook

In Fallbrook in August, humidity is 42%. With an average temperature of 25°C (77°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring the sights without feeling overwhelmed by heat or stickiness.

August Average Humidity in Fallbrook

This chart illustrates the average monthly humidity levels in Fallbrook, 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 Fallbrook is approximately 42%, 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 Fallbrook

In Fallbrook 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 Fallbrook.

Maximum UV Index Levels in Fallbrook for August

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

Data source: Fallbrook 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 Fallbrook Compares to Other Months

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

This table compares monthly weather conditions in Fallbrook, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	66 mm (2.6 inches)	72%	moderate
February Weather	13°C (55°F)	64 mm (2.5 inches)	77%	high
March Weather	14°C (57°F)	67 mm (2.6 inches)	67%	very high
April Weather	17°C (62°F)	31 mm (1.2 inches)	56%	very high
May Weather	18°C (64°F)	19 mm (0.8 inches)	46%	extreme
June Weather	21°C (70°F)	3 mm (0.1 inches)	48%	extreme
July Weather	25°C (77°F)	4 mm (0.2 inches)	46%	extreme
August Weather	25°C (77°F)	3 mm (0.1 inches)	42%	extreme
September Weather	24°C (75°F)	4 mm (0.2 inches)	52%	very high
October Weather	20°C (69°F)	11 mm (0.4 inches)	58%	high
November Weather	17°C (62°F)	28 mm (1.1 inches)	66%	moderate
December Weather	13°C (55°F)	66 mm (2.6 inches)	74%	moderate