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October Weather in San Francisco, Argentina

Last updated: August 22, 2025

In October, the average temperature in San Francisco, Argentina hovers around 19°C (67°F). However, be prepared for fluctuations, as temperatures can dip to a cool 4°C (40°F) or soar up to a scorching 39°C (103°F). Expect about 89 mm (3.5 in) of precipitation over 7 days, paired with an average humidity of 50%.

October Temperature in San Francisco

In October in San Francisco, the average temperature is 19°C (67°F), with maximums reaching up to 39°C (103°F) and minimums dropping as low as 4°C (40°F). Be sure to pack for a range of temperatures to fully enjoy your visit to San Francisco this month!

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 19°C (67°F), with highs reaching up to 39°C (103°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec777571675954535762677376
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 total precipitation amount is 89 mm (3.5 in) spread over a period of 7 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 89 mm (3.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec10570901206119191437898495
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 50%. With an average temperature of 19°C (67°F), this humidity feels like a comfortable embrace, making it perfect for leisurely strolls and outdoor adventures while ensuring travelers remain refreshed and energized.

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 50%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%57%65%76%83%78%58%54%59%50%53%57%
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.
JanFebMarAprMayJunJulAugSepOctNovDec141312864569111414
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 Weather25°C (78°F)105 mm (4.1 inches)51%extreme
February Weather24°C (75°F)70 mm (2.8 inches)57%extreme
March Weather22°C (72°F)90 mm (3.5 inches)65%extreme
April Weather19°C (67°F)120 mm (4.7 inches)76%very high
May Weather15°C (59°F)61 mm (2.4 inches)83%high
June Weather12°C (54°F)19 mm (0.7 inches)78%moderate
July Weather11°C (53°F)19 mm (0.8 inches)58%moderate
August Weather14°C (57°F)14 mm (0.5 inches)54%high
September Weather17°C (63°F)37 mm (1.5 inches)59%very high
October Weather19°C (67°F)89 mm (3.5 inches)50%extreme
November Weather23°C (73°F)84 mm (3.3 inches)53%extreme
December Weather24°C (76°F)95 mm (3.7 inches)57%extreme

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