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October Weather in Millbrae, United States

Last updated: June 24, 2025

In October, the average temperature in Millbrae, United States is a pleasant 15°C (60°F). Visitors can expect a comfortable range, with minimum temperatures dropping to 9°C (49°F) and highs reaching up to 27°C (80°F). However, it's wise to prepare for some rain, as the area receives about 27 mm (1.1 in) of precipitation over 2 days. With an average humidity of 80%, the atmosphere can feel quite warm and inviting.

October Temperature in Millbrae

In October in Millbrae, the average temperature is 15°C (60°F). The maximum can reach 27°C (80°F), and the minimum can be as low as 9°C (49°F). It's a great time to visit for those who enjoy mild weather and comfortable temperatures.

October Weather in Millbrae: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Millbrae, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Millbrae, October typically has an average temperature of 15°C (60°F), with highs reaching up to 27°C (80°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec525253545558586062595653
Data source: Temperature data for Millbrae 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 Millbrae

In Millbrae in October, the precipitation amount is 27 mm (1.1 in) over the course of 2 days.

October Precipitation Trends in Millbrae

The chart displays monthly precipitation patterns in Millbrae, 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 Millbrae, October typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec1021017834224333274892
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Millbrae

In Millbrae in October humidity is 80%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace that can make even the simplest stroll feel like a workout, leaving travelers yearning for a refreshing breeze or shade to escape the weight of the air.

October Average Humidity in Millbrae

This chart illustrates the average monthly humidity levels in Millbrae, 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 Millbrae is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%82%79%83%84%87%87%86%80%79%79%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Millbrae

In Millbrae 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 Millbrae.

Maximum UV Index Levels in Millbrae for October

The chart shows the monthly maximum UV Index (UVI) for Millbrae 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 Millbrae typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109743
Data source: Millbrae 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 Millbrae Compares to Other Months

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

This table compares monthly weather conditions in Millbrae, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)102 mm (4.0 inches)85%moderate
February Weather11°C (53°F)101 mm (4.0 inches)82%moderate
March Weather12°C (53°F)77 mm (3.0 inches)82%very high
April Weather12°C (55°F)34 mm (1.3 inches)79%very high
May Weather13°C (56°F)22 mm (0.9 inches)83%very high
June Weather15°C (58°F)4 mm (0.2 inches)84%extreme
July Weather15°C (59°F)3 mm (0.1 inches)87%extreme
August Weather16°C (61°F)3 mm (0.1 inches)87%very high
September Weather16°C (62°F)3 mm (0.1 inches)86%very high
October Weather15°C (60°F)27 mm (1.1 inches)80%high
November Weather13°C (56°F)48 mm (1.9 inches)79%moderate
December Weather12°C (53°F)92 mm (3.6 inches)79%moderate

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