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July Weather in San Bruno, United States

Last updated: June 24, 2025

In July, the average temperature in San Bruno, United States hovers around 15°C (60°F), creating a mild atmosphere. You can expect a minimum of 11°C (52°F) and a peak temperature reaching 24°C (76°F). With only 3 mm (0.1 in) of precipitation over 0 days, the month remains predominantly dry, while the average humidity is a cozy 87%. Perfect weather for outdoor adventures!

July Temperature in San Bruno

In July in San Bruno, the average temperature is 15°C (60°F). The maximum can reach 24°C (76°F), and the minimum can be as low as 11°C (52°F). This mild climate makes San Bruno an ideal destination for outdoor activities and leisurely exploration.

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

The chart illustrates July temperature patterns in San Bruno, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bruno, July typically has an average temperature of 15°C (60°F), with highs reaching up to 24°C (76°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec515253555659596162605552
Data source: Temperature data for San Bruno 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.

July Precipitation in San Bruno

In San Bruno in July, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

July Precipitation Trends in San Bruno

The chart displays monthly precipitation patterns in San Bruno, 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 Bruno, July typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec1061097835203322305095
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in San Bruno

In San Bruno in July humidity is 87%. With an average temperature of 15°C (60°F), this humidity feels like you're wrapped in a damp blanket, making it a challenge for travelers to stay comfortable and energetic.

July Average Humidity in San Bruno

This chart illustrates the average monthly humidity levels in San Bruno, 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 Bruno is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%82%79%83%84%87%87%86%80%79%79%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Bruno

In San Bruno 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 Bruno.

Maximum UV Index Levels in San Bruno for July

The chart shows the monthly maximum UV Index (UVI) for San Bruno 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 Bruno typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109743
Data source: San Bruno 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 Bruno Compares to Other Months

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

This table compares monthly weather conditions in San Bruno, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)106 mm (4.2 inches)85%moderate
February Weather11°C (52°F)109 mm (4.3 inches)82%moderate
March Weather12°C (53°F)78 mm (3.1 inches)82%very high
April Weather13°C (55°F)35 mm (1.4 inches)79%very high
May Weather14°C (57°F)20 mm (0.8 inches)83%very high
June Weather15°C (60°F)3 mm (0.1 inches)84%extreme
July Weather15°C (60°F)3 mm (0.1 inches)87%extreme
August Weather16°C (61°F)2 mm (0.1 inches)87%very high
September Weather17°C (63°F)2 mm (0.1 inches)86%very high
October Weather16°C (60°F)30 mm (1.2 inches)80%high
November Weather13°C (56°F)50 mm (2.0 inches)79%moderate
December Weather11°C (52°F)95 mm (3.7 inches)79%moderate

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