October weather forecast
Monterey, CA

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The rugged mountainous coast of Big Sur in Monterey, California
The rugged mountainous coast of Big Sur in Monterey, California

Weather in October

As Monterey transitions more into the autumn season, October ushers in a cooler atmosphere. Though the daylight continues to reduce to 11.2 hours, the city resumes its rainfall with an appreciable 0.47" (12mm) spread over 4.5 days. Temperatures, both highs and lows, recede, with the low temperature dropping to a cooler 53.6°F (12°C). Meanwhile, the sea temperature remains relatively steady at 57.8°F (14.3°C). Therefore, October in Monterey is a distinct mix of decreasing temperatures, slowly increasing rainfall, and diminishing daylight.

Temperature

Monterey commences October with an average high-temperature of a still pleasant 68.7°F (20.4°C), maintaining a close resemblance to the previous month. Monterey records an average nighttime low-temperature of 53.6°F (12°C) throughout October.

Humidity

The average relative humidity in October in Monterey is 69%.

Rainfall

In Monterey, during October, the rain falls for 4.5 days and regularly aggregates up to 0.47" (12mm) of precipitation. In Monterey, during the entire year, the rain falls for 73.6 days and collects up to 11.77" (299mm) of precipitation.

Ocean temperature

In October, the average ocean temperature in Monterey is 57.7°F (14.3°C).
Note: Engaging in a swim in 57.7°F (14.3°C) can threaten life. Brief exposure to 55.4°F (13°C) waters is uneasy, and submersion below 50°F (10°C) can lead to cold shock and disrupted breathing patterns, varying by individual.

Daylight

In October, the average length of the day is 11h and 14min.
On the first day of the month, sunrise is at 7:03 am and sunset at 6:50 pm. On the last day of October, in Monterey, sunrise is at 7:30 am and sunset at 6:11 pm PDT.

Sunshine

The average sunshine in October is 7.2h.

UV index

The average daily maximum UV index in October in Monterey is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 4 in October transforms into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

What are the temperatures in Monterey in October?

The high-temperature during October is 68.7°F (20.4°C) and the low-temperature is 53.6°F (12°C).

What is the average humidity in October in Monterey?

In October, the average relative humidity in Monterey, California, is 69%.

How many days does it rain in October in Monterey?

In Monterey, in October, it is raining for 4.5 days, with typically 0.47" (12mm) of accumulated precipitation.

What is the water temperature in October in Monterey?

In October, the average ocean temperature in Monterey is 57.7°F (14.3°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Monterey have in October?

In Monterey, the average day length in October is 11h and 14min.

When is the sunrise / sunset in October in Monterey?

On the first day of October in Monterey, sunrise is at 7:03 am and sunset at 6:50 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 6:11 pm PDT.

How many hours of sunshine does Monterey have in October?

In October, the average sunshine duration in Monterey, California, is 7.2h.

What is the UV index intensity in October in Monterey?

In Monterey, California, the average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Monterey, CA

Average temperature in October - Monterey, CA
  • Average high temperature in October: 68.7°F

The warmest month (with the highest average high temperature) is September (72.5°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in October: 53.6°F

The months with the highest average low temperature are August and September (55.2°F).
The coldest month (with the lowest average low temperature) is February (46°F).

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Average pressure in October
Monterey, CA

Average pressure in October - Monterey, CA
  • Average pressure in October: 29.98"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

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Average wind speed in October
Monterey, CA

Average wind speed in October - Monterey, CA
  • Average wind speed in October: 5.8mph

The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in October
Monterey, CA

Average humidity in October - Monterey, CA
  • Average humidity in October: 69%

The months with the highest relative humidity are March and May (76%).
The month with the lowest relative humidity is November (68%).

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Average rainfall in October
Monterey, CA

Average rainfall in October - Monterey, CA
  • Average rainfall in October: 0.47"

The wettest month (with the highest rainfall) is December (2.4").
The driest months (with the least rainfall) are July and August (0.08").

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Average rainfall days in October
Monterey, CA

Average rainfall days in October - Monterey, CA
  • Average rainfall days in October: 4.5 days

The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (1.1 days).

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Average sea temperature in October
Monterey, CA

Average sea temperature in October - Monterey, CA
  • Average sea temperature in October: 57.8°F

The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).

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Average daylight in October /
Average sunshine in October
Monterey, CA

Average daylight in October / Average sunshine in October - Monterey, CA
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in October: 7h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in October
Monterey, CA

Average sunshine days in October - Monterey, CA
  • Average sunshine days in October: 25.4 days

The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.8 days).

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Average UV index in October
Monterey, CA

Average UV index in October - Monterey, CA
  • Average UV index in October: 4

The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in October
Monterey, CA

Average cloud cover in October - Monterey, CA
  • Average cloud cover in October: 16

The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in October
Monterey, CA

Average visibility in October - Monterey, CA
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Monterey, California, USA

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