nomadseason

July Weather in San Francisco, Peru

Last updated: August 27, 2025

The average temperature in San Francisco, Peru during July is a pleasant 18°C (64°F). Expect a minimum of 13°C (56°F) and a maximum of 23°C (74°F), perfect for enjoying outdoor activities. With just 1 mm (0.0 in) of precipitation over 0 days, the weather is likely to be dry. Additionally, the average humidity hovers around 56%, providing comfortable conditions for your visit.

July Temperature in San Francisco

In July in San Francisco, the average temperature is 18°C (64°F). The maximum can reach 23°C (74°F) and the minimum can be as low as 13°C (56°F). This pleasant climate makes it an ideal time for outdoor activities and sightseeing.

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

The chart illustrates July 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, July typically has an average temperature of 18°C (64°F), with highs reaching up to 23°C (74°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec686969686664646464646567
Data source: Temperature data for San Francisco generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in San Francisco

In San Francisco in July, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

July Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In San Francisco, July typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec73845820421125513
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

July Humidity in San Francisco

In San Francisco in July humidity is 56%. With an average temperature of 18°C (64°F), this humidity feels like a comfortable embrace that makes exploring the area pleasant, although it may leave you feeling slightly sticky during active pursuits.

July Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in San Francisco is approximately 56%, 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 July generated using information from the Copernicus Climate Change Service.

July UV Index in San Francisco

In San Francisco in July, 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 San Francisco.

Maximum UV Index Levels in San Francisco for July

The chart shows the monthly maximum UV Index (UVI) for San Francisco in July, 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 July, the maximum UV index in San Francisco typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151615141110111214151615
Data source: San Francisco July 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 July 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 July’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 July’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

Compare San Francisco's Climate with Cities Worldwide