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October Weather in Monterey, United States

Last updated: June 24, 2025

In October, the average temperature in Monterey, United States hovers around 12°C (54°F). This month brings a minimum temperature that can dip to -4°C (24°F) and a maximum that can soar to 29°C (84°F). Expect 115 mm (4.5 in) of precipitation spread over approximately 12 days, with humidity levels averaging a high 80%.

October Temperature in Monterey

In October in Monterey, the average temperature is 12°C (54°F), with maximums reaching up to 29°C (84°F) and minimums dropping as low as -4°C (24°F). This makes it a perfect time for travelers to experience a variety of weather, so be sure to pack accordingly!

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

The chart illustrates October temperature patterns in Monterey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monterey, October typically has an average temperature of 12°C (54°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec303640505966706863544035
Data source: Temperature data for Monterey 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 Monterey

In Monterey in October, the total precipitation amount is 115 mm (4.5 in) over a span of 12 days.

October Precipitation Trends in Monterey

The chart displays monthly precipitation patterns in Monterey, 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 Monterey, October typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec7611586126151107861291171167296
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Monterey

In Monterey in October, humidity is 80%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket that wraps around you, making it feel much cooler and damp. Traveling in these conditions might leave you feeling chilly and slightly uncomfortable, as the moisture in the air clings to your skin and clothes, turning each step into a soggy endeavor.

October Average Humidity in Monterey

This chart illustrates the average monthly humidity levels in Monterey, 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 Monterey is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Monterey

In Monterey 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 Monterey.

Maximum UV Index Levels in Monterey for October

The chart shows the monthly maximum UV Index (UVI) for Monterey 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 Monterey typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Monterey 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 Monterey Compares to Other Months

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

This table compares monthly weather conditions in Monterey, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)76 mm (3.0 inches)86%moderate
February Weather2°C (36°F)115 mm (4.5 inches)86%high
March Weather5°C (41°F)86 mm (3.4 inches)86%very high
April Weather10°C (50°F)126 mm (5.0 inches)84%very high
May Weather15°C (60°F)151 mm (5.9 inches)78%extreme
June Weather19°C (66°F)107 mm (4.2 inches)79%extreme
July Weather21°C (70°F)86 mm (3.4 inches)70%extreme
August Weather20°C (68°F)129 mm (5.1 inches)59%very high
September Weather17°C (64°F)117 mm (4.6 inches)68%very high
October Weather12°C (54°F)115 mm (4.5 inches)80%high
November Weather4°C (40°F)72 mm (2.8 inches)86%moderate
December Weather2°C (35°F)96 mm (3.8 inches)85%moderate

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