October Weather in San Jose, United States

Last updated: February 24, 2025

October in San Jose, United States offers a delightful mix of warm and cool temperatures. With a maximum reaching 34°C (94°F) and a comfortable average of 17°C (63°F), residents and visitors can relish pleasant outdoor activities. The month showcases a refreshing contrast with a minimum temperature of 5°C (42°F) at night. While the region experiences minimal rainfall, totaling just 25 mm (1.0 in) over one rainy day, humidity remains at a moderate 62%, contributing to the overall enjoyable climate. Embrace the vibrant autumn season in San Jose, where variety brings a unique charm to daily life.

October Temperature in San Jose

In October, temperatures in San Jose start to cool down as the region transitions from the heat of summer. With minimums averaging around 5°C (42°F) and maximums reaching up to 34°C (94°F), the month offers a comfortable range for outdoor activities. The average temperature settles at about 17°C (63°F), making it a pleasant time to explore the city. Compared to the scorching temperatures of September, this dip is refreshing, yet still retains enough warmth for those who crave sunny days. As fall settles in, the gradual temperature decline signifies a shift towards more moderate, enjoyable conditions, perfect for enjoying the vibrant autumn scenery.

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.
JanFebMarAprMayJunJulAugSepOctNovDec505153565964666766635550
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, October marks a significant transition as the region begins to shift from its dry summer months. With an average precipitation of 25 mm (1.0 in), October is a refreshing change from the arid conditions of the preceding summer, which saw no recorded rainfall. This single day of rain sets the tone for the wetter months ahead, as November and December bring increased precipitation of 56 mm (2.2 in) and 116 mm (4.6 in), respectively. It's noteworthy that while October experiences only one rainy day, this marks the start of a gradual return to a more balanced hydrological cycle, offering hope for replenished reservoirs and vibrant landscapes as winter approaches. Overall, the data indicates a clear trend of increasing rainfall, paving the way for the region's lush autumn and upcoming wet season.

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.
JanFebMarAprMayJunJulAugSepOctNovDec145133114372410132556116
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in San Jose

As October rolls into San Jose, the city's humidity levels begin to shift, reflecting a gradual transition toward wetter months ahead. With October's average humidity at 62%, it marks a noticeable uptick from the drier summer months of July and August, which saw averages as low as 54%. This increase aligns with a broader trend where humidity starts to rise again after the summertime dip, hinting at the upcoming rainy season. Compared to the 84% in February and the 82% in January, October's humidity is comfortably moderate, balancing the warm autumn days with a hint of moisture in the air as the region prepares for winter.

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, allowing you to see how October's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in San Jose

As October unfolds in San Jose, the UV Index drops to a high level of 7, indicating a significant shift from the extreme conditions of summer. With a burn time of 25 minutes, residents can enjoy the outdoors but should still take precautions. This month follows a trend set in the warmer spring and summer months, where indices peaked at 11, urging strong sun protection. The gradual decline from the intense sunlight of May through September suggests a transition to milder autumn days, allowing for longer exposure times compared to the previous months. As the year progresses toward November’s moderate UV Index of 5, it’s essential to stay informed and adjust your sun safety habits accordingly. For detailed UV trends and tips, visit San Jose UV Index.

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.
JanFebMarAprMayJunJulAugSepOctNovDec4589111111109753
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.

October Sunshine in San Jose

As October arrives in San Jose, the city begins to transition from the sun-drenched days of summer, with an impressive 379 hours of sunshine in July, to a milder but still vibrant autumn. With 286 hours of sunlight this month, the days gradually shorten, but the warmth lingers, offering a perfect backdrop for outdoor activities and fall festivities. Notably, October experiences a slight decline from the summer peak, as sunshine hours wind down towards winter, tracking downward from 360 hours in May. This seasonal shift highlights a steady decrease in daylight that continues through the year, yet October's sunshine remains a cherished treasure, illuminating the picturesque landscape of San Jose before the chill of November sets in.

Monthly Sunshine Duration in San Jose: October Highlighted

The October sunshine duration represents the total number of hours San Jose experiences direct sunlight during the month of October, excluding cloudy or obstructed periods. This chart compares the sunshine duration of October with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec162h222h269h303h360h373h379h348h310h286h233h206h
Data source: San Jose October Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Jose During October

In October, San Jose enjoys a 58% chance of sunny weather, marking a transition as the summer's warmth fades into the cooler fall months. While this figure is slightly below the sunny heights of August (84%) and September (80%), it still reflects a favorable likelihood of pleasant weather. Compared to the earlier months of the year, where chances of sunshine hover around the mid to low 50s, October presents a moderate promise of clear skies, continuing the trend of relatively mild conditions as the city shifts into autumn. As the days grow shorter and the leaves change color, those in San Jose can still expect a fair share of sunny days before winter sets in.

Percentage of Sunny Days in October in San Jose

The chart illustrates the percentage of sunny days in San Jose throughout the year, with October highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often San Jose experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec44%57%56%56%75%74%75%84%80%58%55%40%
Data source: San Jose October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Jose in October

As the year unfolds in San Jose, the daylight duration showcases a captivating pattern, peaking in the warmer months. April to July thrives with 14 hours of sunlight, encouraging outdoor activities and vibrant community life. However, as autumn sets in, a gradual decline begins; October experiences 11 hours of daylight, signaling the transition toward shorter days. This shift into the fall season is accompanied by a cozy atmosphere, inviting residents to savor the changing colors and cooler temperatures. Overall, the trend illustrates a dynamic ebb and flow, from the 9 hours of winter's chill to the lively 14 hours of summer's warmth, reflecting the beautiful changes of nature throughout the year.

Average Daylight Hours in San Jose for October

The chart illustrates the variation in daylight duration in San Jose throughout the year, with October highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 55m10h 49m11h 59m13h 10m14h 10m14h 39m14h 23m13h 30m12h 21m11h 10m10h 9m9h 38m
Data source: San Jose daylight hours, calculated by summing the hours between sunrise and sunset for each day.

October Winds in San Jose

As October arrives in San Jose, a refreshing breeze begins to sweep through the city, with average wind speeds reaching 2.1 m/s (5 mph). This marks a return to a gentle consistency, reminiscent of earlier months like January and March. After experiencing a subtle dip in summer, where winds slowed to their yearly low in August, October's breezes bring a comforting reminder of the changing seasons. The shift not only enhances the charm of fall in the area but also sets the stage for the approaching winter months, where average speeds stabilize once again, particularly in December at 2.2 m/s (5 mph). This interplay of wind patterns highlights the delicate balance of San Jose's climate, painting a picture of a region where each month contributes uniquely to the weather's seasonal tapestry.

Average October Wind Speed in San Jose

The chart displays monthly wind speed patterns in San Jose, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.12.22.11.92.22.11.61.51.62.1 m/s1.72.2
Data source: San Jose October wind data, generated using information from the Copernicus Climate Change Service.

How October Weather in San Jose Compares to Other Months

The weather in San Jose changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in San Jose and find detailed weather information for every month.

October and January present stark contrasts in weather. October typically enjoys milder temperatures, with a minimum of 5°C (42°F) and an average of 17°C (63°F), peaking at a warm 34°C (94°F). In this month, precipitation is minimal, averaging just 25 mm (1.0 in) over one day, with humidity levels around 62%. In contrast, January's cooler climate features a minimum of 0°C (32°F) and an average of 10°C (51°F), with a maximum temperature of 24°C (75°F). This month experiences significantly higher rainfall, averaging 145 mm (5.7 in) over eight days and maintains a higher humidity level of 82%. For more details, check out San Jose weather in January.

The weather in October is generally warmer and drier compared to February. October boasts a minimum temperature of 5°C (42°F) and an average of 17°C (63°F), with maximum temperatures reaching up to 34°C (94°F). The month sees limited rainfall, averaging just 25 mm (1.0 in) over 1 day, coupled with a humidity level of 62%.

In contrast, February experiences cooler temperatures, ranging from a minimum of -1°C (30°F) to an average of 11°C (52°F), with maximums peaking at 25°C (77°F). This month is significantly wetter, receiving about 133 mm (5.2 in) of precipitation over 8 days, and averaging higher humidity at 84%. For more detailed information, you can visit San Jose weather in February.

When comparing the weather in October and March, notable differences emerge. October boasts a wider temperature range, with a minimum of 5°C (42°F) and a maximum reaching up to 34°C (94°F), while March's temperatures are milder, ranging from a minimum of 1°C (34°F) to a maximum of 26°C (79°F). Precipitation levels also contrast sharply; October is relatively dry with only 25 mm (1.0 in) over about one day, whereas March experiences significantly more rainfall, totaling 114 mm (4.5 in) across approximately 12 days. Additionally, March has a higher humidity level at 82%, compared to October's humidity of 62%. For more detailed insights, you can check San Jose weather in March.

October and April weather presents distinct characteristics reflecting the transition between seasons. In October, temperatures range from a minimum of 5°C (42°F) to a maximum of 34°C (94°F), with an average of 17°C (63°F) and relatively low precipitation of 25 mm (1.0 in) over just one rainy day. The humidity sits at 62%, providing a comfortable climate. In contrast, April experiences slightly cooler temperatures, with a minimum of 3°C (38°F), an average of 13°C (56°F), and a maximum of 31°C (88°F). This month has higher precipitation at 37 mm (1.4 in), spread over four days, and increased humidity at 78%. These differences contribute to distinct seasonal experiences in each month. For more details on the specifics of April's climate, visit San Jose weather in April.

In October, temperatures in San Jose can range from a minimum of 5°C (42°F) to a maximum of 34°C (94°F), with an average temperature of 17°C (63°F). The month experiences about 25 mm (1.0 in) of precipitation over just 1 day, and humidity levels hover around 62%. In contrast, May sees slightly cooler temperatures, with a minimum of 5°C (40°F) and a maximum of 32°C (90°F), averaging 15°C (59°F). This month has similar precipitation levels at 24 mm (0.9 in) but occurs over 2 days, along with a higher humidity level of 71%. For a closer look at weather patterns, you can check San Jose weather in May.

October and June offer distinct weather experiences. In October, temperatures range from a minimum of 5°C (42°F) to a maximum of 34°C (94°F), with an average of 17°C (63°F), and there's a slight chance of precipitation, averaging around 25 mm (1.0 in) over about 1 day. The humidity level sits comfortably at 62%. In contrast, June sees slightly milder temperatures, with lows of 8°C (47°F) and highs reaching up to 37°C (99°F), while maintaining a similar average of 18°C (64°F). Remarkably, June experiences little to no precipitation, with just 1 mm (0.0 in) and no rainy days, and a humidity of 64%. For more detailed information about the weather in June, visit San Jose weather in June.

When comparing the weather in October and July, one can observe a few notable differences. October presents a wider range of temperatures, with minimums dipping to 5°C (42°F) and an average of 17°C (63°F), while July maintains a milder minimum at 10°C (50°F) and an average of 19°C (66°F). Both months see a maximum temperature of 34°C (93°F to 94°F), but October is characterized by brief precipitation, averaging 25 mm (1.0 in) over just one day, in contrast to July’s completely dry conditions with no recorded rainfall. Humidity levels are slightly higher in October at 62%, compared to July’s 58%. For more details on July weather patterns, visit San Jose weather in July.

October and August present distinct contrasts in weather. In October, temperatures range from a cooler minimum of 5°C (42°F) to a maximum of 34°C (94°F), with an average of 17°C (63°F), accompanied by 25 mm of precipitation over just one day. This month sees increased humidity at 62%. In contrast, August experiences generally warmer conditions, with a minimum of 11°C (52°F) and a peak of 39°C (102°F), resulting in an average of 19°C (67°F), and notably, it boasts dry weather with no recorded precipitation. The humidity in August is also lower at 54%. For more detailed information, you can check San Jose weather in August.

In comparing the weather patterns of October and September, October tends to be slightly cooler, with average temperatures ranging from a minimum of 5°C (42°F) to a maximum of 34°C (94°F), while September experiences milder temperatures with a minimum of 7°C (45°F) and a peak of 41°C (106°F). Precipitation levels are notably higher in October, with 25 mm (1.0 in) recorded over just one day, whereas September remains quite dry with only 3 mm (0.1 in) and no recorded precipitation days. Additionally, October exhibits a higher humidity level of 62%, compared to September's 55%. For a more detailed insight into September weather, you can refer to San Jose weather in September.

October and November exhibit distinct differences in weather patterns. In October, temperatures range from a minimum of 5°C (42°F) to a maximum of 34°C (94°F), with an average of 17°C (63°F). Precipitation is relatively low, with just 25 mm (1.0 in) occurring over 1 day, and humidity sits at 62%. In contrast, November sees a notable drop in temperatures, with a minimum of 1°C (34°F) and an average of 13°C (56°F), reaching up to 28°C (83°F) at most. The month is wetter, receiving 56 mm (2.2 in) of rain spread over 5 days, accompanied by increased humidity at 78%. For more detailed insights, you can visit San Jose weather in November.

October weather typically features a wider range of temperatures, with minimums around 5°C (42°F) and maximums soaring to 34°C (94°F). In contrast, December brings cooler conditions, with average temperatures dropping to around 10°C (50°F) and a maximum of 24°C (76°F). October experiences relatively low precipitation, averaging just 25 mm (1.0 in) over the course of a single day, while December sees a significant increase in rainfall, totaling 116 mm (4.6 in) over nine days. Additionally, December tends to be more humid, with levels reaching 80%, compared to October's 62% humidity. For more details on December weather, check out San Jose weather in December.

Compare San Jose's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in San Jose

As October rolls into San Jose, the weather showcases a delightful transformation, marked by mild temperatures and lower humidity compared to the sweltering summer months. With highs reaching up to 34°C and cooler nights averaging around 17°C, the days are pleasantly warm and inviting. Expect only occasional light rainfall, with minimal precipitation disrupting the otherwise clear autumn skies. This month stands out as a transitional period, providing a refreshing change before the cooler months take hold. For a deeper dive into the year-round climate nuances, explore our resource on San Jose Climate.