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October Weather in Santa Rosa, United States

Last updated: June 24, 2025

In October, the average temperature in Santa Rosa, United States hovers around 17°C (63°F), with a minimum dipping to 3°C (38°F) and a maximum rising as high as 35°C (96°F). Expect around 41 mm (1.6 in) of precipitation over 2 days, contributing to an average humidity of 72%.

October Temperature in Santa Rosa

In October in Santa Rosa, the average temperature is 17°C (63°F). Maximums can reach 35°C (96°F), while minimums can drop to as low as 3°C (38°F). Be sure to pack layers to enjoy the varying temperatures throughout your travels.

October Weather in Santa Rosa: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Santa Rosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Rosa, October typically has an average temperature of 17°C (63°F), with highs reaching up to 35°C (96°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec485052576269717169635348
Data source: Temperature data for Santa Rosa 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 Santa Rosa

In Santa Rosa in October, the precipitation amount is 41 mm (1.6 in) over the course of 2 days.

October Precipitation Trends in Santa Rosa

The chart displays monthly precipitation patterns in Santa Rosa, 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 Santa Rosa, October typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec13915597452820024158101
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Santa Rosa

In Santa Rosa in October, humidity is 72%. With an average temperature of 17°C (63°F), this humidity feels like a muggy embrace, making outdoor activities a bit sticky and requiring plenty of hydration for a comfortable travel experience.

October Average Humidity in Santa Rosa

This chart illustrates the average monthly humidity levels in Santa Rosa, 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 Santa Rosa is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%80%80%76%70%66%68%72%84%84%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Santa Rosa

In Santa Rosa in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Santa Rosa, you can refer to this Hourly UV Index in Santa Rosa.

Maximum UV Index Levels in Santa Rosa for October

The chart shows the monthly maximum UV Index (UVI) for Santa Rosa 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 Santa Rosa typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Santa Rosa 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 Santa Rosa Compares to Other Months

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

This table compares monthly weather conditions in Santa Rosa, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)139 mm (5.5 inches)86%moderate
February Weather10°C (50°F)155 mm (6.1 inches)84%moderate
March Weather11°C (52°F)97 mm (3.8 inches)83%high
April Weather14°C (57°F)45 mm (1.8 inches)80%very high
May Weather17°C (62°F)27 mm (1.1 inches)80%very high
June Weather21°C (69°F)2 mm (0.1 inches)76%extreme
July Weather22°C (71°F)0 mm (0.0 inches)70%extreme
August Weather21°C (71°F)0 mm (0.0 inches)66%very high
September Weather20°C (69°F)2 mm (0.1 inches)68%very high
October Weather17°C (63°F)41 mm (1.6 inches)72%high
November Weather12°C (54°F)58 mm (2.3 inches)84%moderate
December Weather9°C (48°F)101 mm (4.0 inches)84%moderate

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