August Weather in National City, United States

Last updated: June 24, 2025

In August, the average temperature in National City, United States is a pleasant 23°C (74°F). Expect the temperature to range from a comfortable 16°C (62°F) at its lowest to a warm 33°C (92°F) at its highest. The month sees minimal precipitation, with only 1 mm (0.1 in) over 0 days, and average humidity levels around 42%—ideal conditions for outdoor activities!

August Temperature in National City

In August in National City, the average temperature is 23°C (74°F). The maximum can reach 33°C (92°F), while the minimum can dip as low as 16°C (62°F). This pleasant climate makes National City an ideal destination for outdoor activities and sightseeing during this time of year.

August Weather in National City: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in National City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In National City, August typically has an average temperature of 23°C (74°F), with highs reaching up to 33°C (92°F) and lows dropping to around 16°C (62°F).

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

August Precipitation in National City

In National City in August, the precipitation amount is 1 mm (0.1 in) during 0 days, indicating a very dry period.

August Precipitation Trends in National City

The chart displays monthly precipitation patterns in National City, 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 National City, August typically receives around 1 mm (0.1 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 National City

In National City in August, humidity is 42%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring the sights without feeling too sticky or oppressive.

August Average Humidity in National City

This chart illustrates the average monthly humidity levels in National City, 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 National City 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 National City

In National City 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 National City.

Maximum UV Index Levels in National City for August

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

Data source: National City 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 National City Compares to Other Months

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

This table compares monthly weather conditions in National City, 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 (56°F)	56 mm (2.2 inches)	72%	moderate
February Weather	13°C (56°F)	68 mm (2.7 inches)	77%	high
March Weather	14°C (57°F)	51 mm (2.0 inches)	67%	very high
April Weather	16°C (61°F)	24 mm (0.9 inches)	56%	very high
May Weather	17°C (63°F)	21 mm (0.8 inches)	46%	extreme
June Weather	19°C (67°F)	2 mm (0.1 inches)	48%	extreme
July Weather	22°C (72°F)	3 mm (0.1 inches)	46%	extreme
August Weather	23°C (74°F)	1 mm (0.1 inches)	42%	very high
September Weather	22°C (72°F)	4 mm (0.1 inches)	52%	very high
October Weather	20°C (68°F)	14 mm (0.6 inches)	58%	high
November Weather	17°C (62°F)	29 mm (1.1 inches)	66%	moderate
December Weather	14°C (57°F)	65 mm (2.5 inches)	74%	moderate