May weather forecast and climate
Monterey, CA

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

Weather in May

The last month of the spring, May, is also an enjoyable month in Monterey, California, with average temperature ranging between max 63.9°F (17.7°C) and min 49.5°F (9.7°C).

Temperature

In May, the average high-temperature is essentially the same as in April - a still enjoyable 63.9°F (17.7°C). In May, the average low-temperature is 49.5°F (9.7°C).

Humidity

March and May, with an average relative humidity of 76%, are most humid months in Monterey.

Rainfall

In Monterey, California, in May, it is raining for 4.8 days, with typically 0.51" (13mm) of accumulated 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 May, the average ocean temperature is 54.1°F (12.3°C).
Note: 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.

Daylight

In Monterey, the average length of the day in May is 14.1h.

Sunshine

In Monterey, California, the average sunshine is 10.9h.

UV index

In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Monterey?

In Monterey, California, in May, the average high-temperature is 63.9°F (17.7°C), and the average low-temperature is 49.5°F (9.7°C).

What is the most humid month in Monterey?

Months with the highest humidity in Monterey, California, are March and May, with an average relative humidity of 76%.

What is the average humidity in May in Monterey?

In Monterey, the average relative humidity in May is 76%.

How many days does it rain in May in Monterey?

In Monterey, California, in May, during 4.8 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

How cold is the water in May in Monterey?

In Monterey, the average seawater temperature in May is 54.1°F (12.3°C). Swimming in 54.1°F (12.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Monterey have in May?

The average length of the day in May is 14.1h.

How long on average sun shines in May in Monterey?

The average sunshine in May in Monterey is 10.9h.

How high is the UV index in May in Monterey?

The average daily maximum UV index in May in Monterey is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in May
Monterey, CA

Average temperature in May - Monterey, CA
  • Average high temperature in May: 63.9°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 May: 49.5°F

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 May
Monterey, CA

Average pressure in May - Monterey, CA
  • Average pressure in May: 29.99"

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

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Average wind speed in May
Monterey, CA

Average wind speed in May - Monterey, CA
  • Average wind speed in May: 7.5mph

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 May
Monterey, CA

Average humidity in May - Monterey, CA
  • Average humidity in May: 76%

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 May
Monterey, CA

Average rainfall in May - Monterey, CA
  • Average rainfall in May: 0.51"

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 May
Monterey, CA

Average rainfall days in May - Monterey, CA
  • Average rainfall days in May: 4.8 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 May
Monterey, CA

Average sea temperature in May - Monterey, CA
  • Average sea temperature in May: 54.2°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 May /
Average sunshine in May
Monterey, CA

Average daylight in May / Average sunshine in May - Monterey, CA
  • Average daylight in May: 14.1h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in May: 10.9h

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

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Average sunshine days in May
Monterey, CA

Average sunshine days in May - Monterey, CA
  • Average sunshine days in May: 23.6 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 May
Monterey, CA

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

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 May
Monterey, CA

Average cloud cover in May - Monterey, CA
  • Average cloud cover in May: 24

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 May
Monterey, CA

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

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

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