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October Weather in San Francisco, Mexico

Last updated: August 27, 2025

In October, the average temperature in San Francisco, Mexico is a comfortable 21°C (70°F). You can expect temperatures to range from a brisk 10°C (50°F) at the lowest to a warm 33°C (92°F) at the highest. This month brings an average of 113 mm (4.4 in) of precipitation over 14 days, contributing to a notably high average humidity of 92%.

October Temperature in San Francisco

In October in San Francisco, the average temperature is 21°C (70°F). Maximums can reach 33°C (92°F) and minimums can be as low as 10°C (50°F). This makes it an ideal time to explore outdoor activities while enjoying a pleasant climate.

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

The chart illustrates October 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, October typically has an average temperature of 21°C (70°F), with highs reaching up to 33°C (92°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec606469747776767674706561
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.

October Precipitation in San Francisco

In San Francisco in October, the precipitation amount is 113 mm (4.4 in) occurring over a span of 14 days.

October Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In San Francisco, October typically receives around 113 mm (4.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec11131921551069175124113219
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in San Francisco

In San Francisco in October, humidity is 92%. With an average temperature of 21°C (70°F), this humidity feels like a sauna, making travel uncomfortable and sticky, as the air becomes thick and heavy, often leading to a sense of fatigue and dampness that lingers on your skin.

October Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in San Francisco is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in San Francisco

In San Francisco in October, 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 October

The chart shows the monthly maximum UV Index (UVI) for San Francisco in October, 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 October, the maximum UV index in San Francisco typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810131413131413131197
Data source: San Francisco October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (60°F)11 mm (0.5 inches)88%very high
February Weather18°C (65°F)13 mm (0.5 inches)86%very high
March Weather20°C (69°F)19 mm (0.7 inches)83%extreme
April Weather23°C (74°F)21 mm (0.8 inches)80%extreme
May Weather25°C (78°F)55 mm (2.2 inches)82%extreme
June Weather25°C (77°F)106 mm (4.2 inches)79%extreme
July Weather24°C (76°F)91 mm (3.6 inches)72%extreme
August Weather24°C (76°F)75 mm (3.0 inches)74%extreme
September Weather23°C (74°F)124 mm (4.9 inches)84%extreme
October Weather21°C (70°F)113 mm (4.4 inches)92%extreme
November Weather18°C (65°F)21 mm (0.8 inches)91%very high
December Weather16°C (61°F)9 mm (0.3 inches)91%high

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