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October Weather in San Francisco, El Salvador

Last updated: August 23, 2025

In October, the average temperature in San Francisco, El Salvador hovers around 25°C (77°F). Expect a comfortable range with a minimum of 19°C (66°F) and highs reaching up to 33°C (92°F). Be prepared for some rain, as 335 mm (13.2 in) is expected over 27 days. With an average humidity of 77%, the air will feel quite moist, so pack accordingly!

October Temperature in San Francisco

In October in San Francisco, the average temperature is 25°C (77°F). Maximum temperatures can reach 33°C (92°F), while the minimum can drop as low as 19°C (66°F). This comfortable climate makes it an ideal destination for travelers seeking pleasant weather and outdoor adventures.

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 25°C (77°F), with highs reaching up to 33°C (92°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec788082828079818078777777
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 335 mm (13.2 in) spread over 27 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 335 mm (13.2 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec2265533226797234295335644
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 77%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly heavy but still pleasant, as long as you stay hydrated and take frequent breaks in the shade.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%59%59%59%68%78%79%77%77%75%67%
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.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
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 Weather26°C (78°F)2 mm (0.1 inches)63%extreme
February Weather27°C (80°F)2 mm (0.1 inches)62%extreme
March Weather28°C (83°F)6 mm (0.2 inches)59%extreme
April Weather28°C (83°F)55 mm (2.2 inches)59%extreme
May Weather27°C (80°F)332 mm (13.1 inches)59%extreme
June Weather26°C (79°F)267 mm (10.5 inches)68%extreme
July Weather27°C (81°F)97 mm (3.8 inches)77%extreme
August Weather26°C (80°F)234 mm (9.2 inches)79%extreme
September Weather26°C (78°F)295 mm (11.6 inches)77%extreme
October Weather25°C (77°F)335 mm (13.2 inches)77%extreme
November Weather25°C (77°F)64 mm (2.5 inches)75%very high
December Weather25°C (77°F)4 mm (0.2 inches)66%very high

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