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October Weather in San Jose, United States

Last updated: June 24, 2025

In October, the average temperature in San Jose, United States hovers around 20°C (68°F). However, you can expect a minimum of 1°C (35°F) and a maximum soaring to 35°C (95°F). With an average humidity of 72%, the atmosphere can feel quite tropical, and you'll likely experience precipitation of 13 mm (0.5 in) over the course of about 2 days.

October Temperature in San Jose

In October in San Jose, the average temperature is 20°C (68°F). Maximums can reach 35°C (95°F), while minimums can be as low as 1°C (35°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates October temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, October typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec465058687686868579685848
Data source: Temperature data for San Jose 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 Jose

In San Jose in October, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.

October Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, 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 Jose, October typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec233216234452228132025
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in San Jose

In San Jose in October humidity is 72%. With an average temperature of 20°C (68°F), this humidity feels like a heavy blanket enveloping you, making every step slightly more laborious and the air thick with moisture, which can be uncomfortable for traveling.

October Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, 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 Jose is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%82%68%55%45%37%43%53%66%72%81%84%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in San Jose

In San Jose in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Jose.

Maximum UV Index Levels in San Jose for October

The chart shows the monthly maximum UV Index (UVI) for San Jose 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 Jose typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111212121211864
Data source: San Jose 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 Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)23 mm (0.9 inches)81%moderate
February Weather10°C (50°F)32 mm (1.2 inches)82%high
March Weather15°C (59°F)16 mm (0.6 inches)68%very high
April Weather20°C (68°F)2 mm (0.1 inches)55%extreme
May Weather24°C (76°F)3 mm (0.1 inches)45%extreme
June Weather30°C (86°F)4 mm (0.2 inches)37%extreme
July Weather30°C (86°F)45 mm (1.8 inches)43%extreme
August Weather29°C (85°F)22 mm (0.9 inches)53%extreme
September Weather26°C (79°F)28 mm (1.1 inches)66%extreme
October Weather20°C (68°F)13 mm (0.5 inches)72%very high
November Weather14°C (58°F)20 mm (0.8 inches)81%high
December Weather9°C (48°F)25 mm (1.0 inches)84%moderate

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