August 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 August

Monterey's August weather prolongs the warmth and sunshine. August ties with July for the driest month at a meager 0.08" (2mm) of rainfall over a day, underlining the absence of substantial precipitation. Temperatures peak once again at around 72.1°F (22.3°C), maintaining the summer heat. However, daylight hours start to recede to 13.5 hours, marking the beginning of shorter days. In essence, August in Monterey still captures the essence of summer with its high temperature, dry weather, and receding sunshine effectively setting the stage for the transition into fall.

Temperature

Monterey registers an average high-temperature of a still pleasant 72.1°F (22.3°C) at the commencement of August, closely related to the preceding month. An average low-temperature of 55.2°F (12.9°C) is anticipated throughout the nights in Monterey during August.

Humidity

The average relative humidity in August is 75%.

Rainfall

July and August are months with the least rain in Monterey when the rain falls for 1.1 days and typically aggregates up to 0.08" (2mm) of rain.

Ocean temperature

The months with the warmest seawater are August and September, with an average ocean temperature of 58.1°F (14.5°C).
Note: You can swim in 58.1°F (14.5°C) below 50°F (10°C) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 55.4°F (13°C) without it is tough.

Daylight

In August, the average length of the day is 13h and 31min.
On the first day of August, sunrise is at 6:14 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 7:36 pm PDT.

Sunshine

In Monterey, the average sunshine in August is 11.9h.

UV index

June through September, with an average maximum UV index of 5, are months with the highest UV index in Monterey. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 5 in August transforms into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Updated: Feb 9, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What is the average August temperature in Monterey?

In August, in Monterey, the average high-temperature is 72.1°F (22.3°C), and the average low-temperature is 55.2°F (12.9°C).

What is the average humidity in August in Monterey?

The average relative humidity in August in Monterey is 75%.

What is the driest month in Monterey?

The months with the least rainfall are July and August Rain falls for 1.1 days and accumulates 0.08" (2mm) of rain.

How many days does it rain in August in Monterey?

In Monterey, California, during August, the rain falls for 1.1 days and regularly aggregates up to 0.08" (2mm) of precipitation.

When is the ocean warmest in Monterey?

August and September, with an average ocean temperature of 58.1°F (14.5°C), are months with the warmest seawater.

How cold is the water in August in Monterey?

In August, the average ocean temperature in Monterey is 58.1°F (14.5°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.

What is the average length of the day in August in Monterey?

In Monterey, California, the average day length in August is 13h and 31min.

When are sunrise and sunset in August in Monterey?

In August, on the first day of the month, sunrise is at 6:14 am and sunset at 8:13 pm. On the last day of the month, in Monterey, California, sunrise is at 6:38 am and sunset at 7:36 pm PDT.

How long on average sun shines in August in Monterey?

In Monterey, California, the average sunshine duration in August is 11.9h.

When is the highest UV index in Monterey?

June through September, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index reading in August in Monterey?

In Monterey, California, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium hazard to health 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 August
Monterey, CA

Average temperature in August - Monterey, CA
  • Average high temperature in August: 72.1°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 August: 55.2°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 August
Monterey, CA

Average pressure in August - Monterey, CA
  • Average pressure in August: 29.93"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 August
Monterey, CA

Average wind speed in August - Monterey, CA
  • Average wind speed in August: 5.6mph

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 August
Monterey, CA

Average humidity in August - Monterey, CA
  • Average humidity in August: 75%

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 August
Monterey, CA

Average rainfall in August - Monterey, CA
  • Average rainfall in August: 0.08"

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 August
Monterey, CA

Average rainfall days in August - Monterey, CA
  • Average rainfall days in August: 1.1 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 August
Monterey, CA

Average sea temperature in August - Monterey, CA
  • Average sea temperature in August: 58.1°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 August /
Average sunshine in August
Monterey, CA

Average daylight in August / Average sunshine in August - Monterey, CA
  • Average daylight in August: 13h and 3min

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 August: 11h and 5min

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 August
Monterey, CA

Average sunshine days in August - Monterey, CA
  • Average sunshine days in August: 27.2 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 August
Monterey, CA

Average UV index in August - Monterey, CA
  • Average UV index in August: 5

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 August
Monterey, CA

Average cloud cover in August - Monterey, CA
  • Average cloud cover in August: 12

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 August
Monterey, CA

Average visibility in August - Monterey, CA
  • Average visibility in August: 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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