October Weather in South San Francisco, United States

Last updated: June 24, 2025

In October, the average temperature in South San Francisco, United States hovers around 16°C (60°F), with a comfortable range between a cozy 9°C (48°F) and a warm 28°C (84°F). Expect some light rain, with 30 mm (1.2 in) of precipitation over 2 days, and enjoy the high humidity level of 80%, which adds a gentle touch to the overall atmosphere.

October Temperature in South San Francisco

In October in South San Francisco, the average temperature is 16°C (60°F). The maximum can reach 28°C (84°F), while the minimum can drop as low as 9°C (48°F). This makes it an ideal time for travelers to enjoy a comfortable climate while exploring the area.

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

The chart illustrates October temperature patterns in South 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 South San Francisco, October typically has an average temperature of 16°C (60°F), with highs reaching up to 28°C (84°F) and lows dropping to around 9°C (48°F).

Data source: Temperature data for South San Francisco generated using information from the Copernicus Climate Change Service.

October Precipitation in South San Francisco

In South San Francisco in October, the precipitation amount is 30 mm (1.2 in) over the course of 2 days.

October Precipitation Trends in South San Francisco

The chart displays monthly precipitation patterns in South 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 South San Francisco, October typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 2 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in South San Francisco

In South San Francisco in October, humidity is 80%. With an average temperature of 16°C (60°F), this humidity feels like walking through a warm, thick haze, making travel feel somewhat stifling and requiring frequent breaks to hydrate and cool down.

October Average Humidity in South San Francisco

This chart illustrates the average monthly humidity levels in South 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 South San Francisco is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in South San Francisco

In South San Francisco in October, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in South San Francisco.

Maximum UV Index Levels in South San Francisco for October

The chart shows the monthly maximum UV Index (UVI) for South 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 South San Francisco typically reaches 7, which falls under the high exposure category.

Data source: South 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 South San Francisco Compares to Other Months

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

This table compares monthly weather conditions in South San Francisco, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	106 mm (4.2 inches)	85%	moderate
February Weather	11°C (52°F)	109 mm (4.3 inches)	82%	moderate
March Weather	12°C (53°F)	78 mm (3.1 inches)	82%	very high
April Weather	13°C (55°F)	35 mm (1.4 inches)	79%	very high
May Weather	14°C (57°F)	20 mm (0.8 inches)	83%	very high
June Weather	15°C (60°F)	3 mm (0.1 inches)	84%	extreme
July Weather	15°C (60°F)	3 mm (0.1 inches)	87%	extreme
August Weather	16°C (61°F)	2 mm (0.1 inches)	87%	very high
September Weather	17°C (63°F)	2 mm (0.1 inches)	86%	very high
October Weather	16°C (60°F)	30 mm (1.2 inches)	80%	high
November Weather	13°C (56°F)	50 mm (2.0 inches)	79%	moderate
December Weather	11°C (52°F)	95 mm (3.7 inches)	79%	moderate