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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 pleasant 20°C (69°F). Expect a minimum of 12°C (55°F) and a comfortable maximum of 30°C (86°F). However, be prepared for some rain, as precipitation amounts to 205 mm (8.1 in) spread over 23 days. It’s a humid month too, with an average humidity of 78%.

October Temperature in San Francisco

In October in San Francisco, the average temperature is 20°C (69°F). The maximum can reach 30°C (86°F), and the minimum can be as low as 12°C (55°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities in San Francisco.

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 20°C (69°F), with highs reaching up to 30°C (86°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec616365707270697070686562
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 205 mm (8.1 in) over a period of 23 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 205 mm (8.1 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec8153465513229710415919720511363
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 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%73%59%53%54%55%61%71%77%78%82%86%
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 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, 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 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141414141413109
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 Weather16°C (62°F)81 mm (3.2 inches)84%very high
February Weather17°C (64°F)53 mm (2.1 inches)73%extreme
March Weather18°C (65°F)46 mm (1.8 inches)59%extreme
April Weather21°C (70°F)55 mm (2.2 inches)52%extreme
May Weather22°C (72°F)132 mm (5.2 inches)53%extreme
June Weather21°C (70°F)297 mm (11.7 inches)55%extreme
July Weather20°C (69°F)104 mm (4.1 inches)61%extreme
August Weather21°C (70°F)159 mm (6.2 inches)71%extreme
September Weather21°C (70°F)197 mm (7.8 inches)77%extreme
October Weather20°C (69°F)205 mm (8.1 inches)78%extreme
November Weather18°C (65°F)113 mm (4.4 inches)82%very high
December Weather17°C (63°F)63 mm (2.5 inches)86%very high

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