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August Weather in San Francisco, Peru

Last updated: August 27, 2025

In August, the average temperature in San Francisco, Peru hovers around 18°C (64°F), providing a pleasant climate for outdoor activities. Expect minimums of 12°C (54°F) and maximums of 22°C (72°F), ensuring comfortable days and mild nights. With a precipitation amount of 0 mm (0.0 in) across 0 days, you'll enjoy dry weather, complemented by an average humidity of 50%. Perfect for exploring or relaxing!

August Temperature in San Francisco

In August, in San Francisco, the average temperature is 18°C (64°F). Maximum temperatures can reach up to 22°C (72°F), while minimums can drop to as low as 12°C (54°F). This mild climate makes San Francisco a wonderful destination for travelers looking to enjoy pleasant weather.

August Weather in San Francisco: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in San Francisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco, August typically has an average temperature of 18°C (64°F), with highs reaching up to 22°C (72°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec686969686664646464646567
Data source: Temperature data for San Francisco generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in San Francisco

In San Francisco in August, the precipitation amount is 0 mm (0.0 in) during 0 days.

August Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, 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 San Francisco, August typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec73845820421125513
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in San Francisco

In San Francisco in August, humidity is 50%. With an average temperature of 18°C (64°F), this humidity feels like a refreshing embrace, making it quite pleasant for traveling as you can comfortably explore without the discomfort of excessive sweat.

August Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, 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 San Francisco is approximately 50%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%89%83%69%56%51%53%68%82%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in San Francisco

In San Francisco in August, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Francisco.

Maximum UV Index Levels in San Francisco for August

The chart shows the monthly maximum UV Index (UVI) for San Francisco 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 San Francisco typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151615141110111214151615
Data source: San Francisco 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 San Francisco Compares to Other Months

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

This table compares monthly weather conditions in San Francisco, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (69°F)73 mm (2.9 inches)89%extreme
February Weather21°C (69°F)84 mm (3.3 inches)89%extreme
March Weather21°C (70°F)58 mm (2.3 inches)90%extreme
April Weather20°C (68°F)20 mm (0.8 inches)89%extreme
May Weather19°C (66°F)4 mm (0.2 inches)83%extreme
June Weather18°C (65°F)1 mm (0.1 inches)69%very high
July Weather18°C (64°F)1 mm (0.0 inches)56%extreme
August Weather18°C (64°F)0 mm (0.0 inches)50%extreme
September Weather18°C (64°F)2 mm (0.1 inches)53%extreme
October Weather18°C (65°F)5 mm (0.2 inches)68%extreme
November Weather19°C (66°F)5 mm (0.2 inches)81%extreme
December Weather19°C (67°F)13 mm (0.5 inches)87%extreme

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