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" spread over 4.5 days. Temperatures, both highs and lows, recede, with the low temperature dropping to a cooler 53.6°F. Meanwhile, the sea temperature remains relatively steady at 57.8°F. Therefore, October in Monterey is a distinct mix of decreasing temperatures, slowly increasing rainfall, and diminishing daylight.

Temperature

The shift to October signals an average high-temperature of a still pleasant 68.7°F, subtly varied from September's 72.5°F. October in Monterey witnesses an average low-temperature hovering around a fresh 53.6°F.

Humidity

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

Rainfall

In Monterey, in October, it is raining for 4.5 days, with typically 0.47" of accumulated precipitation. Throughout the year, in Monterey, there are 73.6 rainfall days, and 11.77" of precipitation is accumulated.

Ocean temperature

In Monterey, the average seawater temperature in October is 57.7°F.
Note: Staying in 57.7°F waters for just a few moments at 55.4°F can be harrowing, and below 50°F poses breathing and cold shock risks, depending on individual tolerance.

Daylight

The average length of the day in October is 11h and 14min.
On the first day of the month, sunrise is at 7:02 am and sunset at 6:51 pm. On the last day of October, sunrise is at 7:30 am and sunset at 6:12 pm PDT.

Sunshine

In October, the average sunshine is 7.2h.

UV index

In Monterey, the average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: In October, the maximum UV index of 4 suggests this advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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FAQ

What is the temperature in October in Monterey?

An average high-temperature, in October, in Monterey, is 68.7°F and the average low-temperature is 53.6°F.

What is the average humidity in October in Monterey?

In Monterey, the average relative humidity in October 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" of accumulated precipitation.

What is the water temperature in October in Monterey?

In October, the average ocean temperature in Monterey is 57.7°F. Swimming in 57.7°F is considered dangerous. Unprotected immersion in temperatures below 50°F causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Monterey have in October?

The average day length in October is 11h and 14min.

What time are sunrise and sunset in October in Monterey?

In October, on the first day of the month, sunrise is at 7:02 am and sunset at 6:51 pm. On the last day of the month, in Monterey, sunrise is at 7:30 am and sunset at 6:12 pm PDT.

How long on average sun shines in October in Monterey?

The average sunshine duration in October is 7.2h.

How high is the UV index in October in Monterey?

The average daily maximum UV index in October in Monterey, California, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
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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