May weather forecast and climate
Morro Bay, CA

The iconic Morro Rock, a famous tourist spot in Morro Bay, California
The iconic Morro Rock, a famous tourist spot in Morro Bay, California

Weather in May

May, the last month of the spring, in Morro Bay, is an agreeable month, with average temperature fluctuating between 68.5°F (20.3°C) and 52.3°F (11.3°C).

Temperature

In Morro Bay, the average high-temperature is almost the same as in April - an agreeable 68.5°F (20.3°C). The average low-temperature, in Morro Bay, is 52.3°F (11.3°C).

Humidity

In May, the average relative humidity is 67%.

Rainfall

In May, the rain falls for 2.6 days. Throughout May, 0.24" (6mm) of precipitation is accumulated. In Morro Bay, California, during the entire year, the rain falls for 53.7 days and collects up to 8.58" (218mm) of precipitation.

Ocean temperature

April and May, with an average ocean temperature of 54.3°F (12.4°C), are months with the coldest seawater in Morro Bay.
Note: Swimming in 54.3°F (12.4°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.

Daylight

In May, the average length of the day is 14h.

Sunshine

In May, the average sunshine in Morro Bay is 11.4h.

UV index

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in May interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Morro Bay?

In May, in Morro Bay, California, the average high-temperature is 68.5°F (20.3°C), and the average low-temperature is 52.3°F (11.3°C).

What is the average humidity in May in Morro Bay?

The average relative humidity in May is 67%.

How much does it rain in Morro Bay in May?

In Morro Bay, in May, it is raining for 2.6 days, with typically 0.24" (6mm) of accumulated precipitation.

What months are the ocean coldest in Morro Bay?

Months with the coldest seawater are April and May, with an average ocean temperature of 54.3°F (12.4°C).

What is the water temperature in May in Morro Bay?

In Morro Bay, California, in May, the average water temperature is 54.3°F (12.4°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 May in Morro Bay?

In Morro Bay, the average length of the day in May is 14h.

How many hours of sunshine does Morro Bay have in May?

In Morro Bay, the average sunshine in May is 11.4h.

What is the UV index reading in May in Morro Bay?

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in May
Morro Bay, CA

Average temperature in May - Morro Bay, CA
  • Average high temperature in May: 68.5°F

The warmest month (with the highest average high temperature) is September (76.3°F).
The month with the lowest average high temperature is December (59.2°F).

  • Average low temperature in May: 52.3°F

The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (47.3°F).

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Average pressure in May
Morro Bay, CA

Average pressure in May - Morro Bay, CA
  • Average pressure in May: 29.97"

The month with the highest atmospheric pressure is January (30.12").
Months with the lowest atmospheric pressure are June and September (29.91").

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Average wind speed in May
Morro Bay, CA

Average wind speed in May - Morro Bay, CA
  • Average wind speed in May: 7.9mph

The windiest month (with the highest average wind speed) is May (7.9mph).
The calmest months (with the lowest average wind speed) are August and September (6mph).

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Average humidity in May
Morro Bay, CA

Average humidity in May - Morro Bay, CA
  • Average humidity in May: 67%

The month with the highest relative humidity is March (70%).
Months with the lowest relative humidity are September and October (61%).

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Average rainfall in May
Morro Bay, CA

Average rainfall in May - Morro Bay, CA
  • Average rainfall in May: 0.24"

The wettest month (with the highest rainfall) is January (1.81").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in May
Morro Bay, CA

Average rainfall days in May - Morro Bay, CA
  • Average rainfall days in May: 2.6 days

The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.7 days).

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Average sea temperature in May
Morro Bay, CA

Average sea temperature in May - Morro Bay, CA
  • Average sea temperature in May: 54.4°F

The best months for swimming (with the highest average sea temperature) are August and October (58.6°F).
The coldest month (with the lowest average sea temperature) is April (54.3°F).

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Average daylight in May /
Average sunshine in May
Morro Bay, CA

Average daylight in May / Average sunshine in May - Morro Bay, CA
  • Average daylight in May: 14h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in May: 11.4h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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Average sunshine days in May
Morro Bay, CA

Average sunshine days in May - Morro Bay, CA
  • Average sunshine days in May: 27.8 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (20.1 days).

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Average UV index in May
Morro Bay, CA

Average UV index in May - Morro Bay, CA
  • Average UV index in May: 5

The month with the highest UV index is August (UV index 6).
Months with the lowest UV index are January, February, March, April, November and December (UV index 4).

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Average cloud cover in May
Morro Bay, CA

Average cloud cover in May - Morro Bay, CA
  • Average cloud cover in May: 16

The month with the most cloud cover is March (Cloud cover 28).
Months with the least cloud cover are August and September (Cloud cover 7).

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Average visibility in May
Morro Bay, CA

Average visibility in May - Morro Bay, 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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