September 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 September

The first month of the autumn, September, is also a moderately hot month in Morro Bay, California, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 59.9°F (15.5°C).

Temperature

The warmest month is September, with an average high-temperature of 76.3°F (24.6°C) and an average low-temperature of 59.9°F (15.5°C).

Humidity

September and October, with an average relative humidity of 61%, are the least humid months in Morro Bay, California.

Rainfall

In Morro Bay, during September, the rain falls for 1.6 days and regularly aggregates up to 0.12" (3mm) of precipitation. Throughout the year, in Morro Bay, there are 53.7 rainfall days, and 8.58" (218mm) of precipitation is accumulated.

Ocean temperature

In Morro Bay, the average seawater temperature is 58.3°F (14.6°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

The average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine in Morro Bay is 11.3h.

UV index

The average daily maximum UV index in Morro Bay is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
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 warmest month in Morro Bay?

September is the warmest month, with an average high-temperature of 76.3°F (24.6°C) and an average low-temperature of 59.9°F (15.5°C).

What is the temperature in September in Morro Bay?

In Morro Bay, California, in September, the average high-temperature is 76.3°F (24.6°C), and the average low-temperature is 59.9°F (15.5°C).

What is the least humid month in Morro Bay?

September and October, with an average relative humidity of 61%, are the least humid months in Morro Bay, California.

What is the average humidity in September in Morro Bay?

In September, the average relative humidity in Morro Bay is 61%.

How many days does it rain in September in Morro Bay?

In Morro Bay, during September, the rain falls for 1.6 days and regularly aggregates up to 0.12" (3mm) of precipitation.

What is the ocean temperature in September in Morro Bay?

In Morro Bay, the average seawater temperature in September is 58.3°F (14.6°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 September in Morro Bay?

In September, the average length of the day in Morro Bay, California, is 12.4h.

How long on average sun shines in September in Morro Bay?

In September, the average sunshine in Morro Bay, California, is 11.3h.

What is the UV index intensity in September in Morro Bay?

The average daily maximum UV index in September in Morro Bay, California, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Morro Bay, CA

Average temperature in September - Morro Bay, CA
  • Average high temperature in September: 76.3°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 September: 59.9°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 September
Morro Bay, CA

Average pressure in September - Morro Bay, CA
  • Average pressure in September: 29.91"

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 September
Morro Bay, CA

Average wind speed in September - Morro Bay, CA
  • Average wind speed in September: 6mph

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 September
Morro Bay, CA

Average humidity in September - Morro Bay, CA
  • Average humidity in September: 61%

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 September
Morro Bay, CA

Average rainfall in September - Morro Bay, CA
  • Average rainfall in September: 0.12"

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 September
Morro Bay, CA

Average rainfall days in September - Morro Bay, CA
  • Average rainfall days in September: 1.6 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 September
Morro Bay, CA

Average sea temperature in September - Morro Bay, CA
  • Average sea temperature in September: 58.3°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 September /
Average sunshine in September
Morro Bay, CA

Average daylight in September / Average sunshine in September - Morro Bay, CA
  • Average daylight in September: 12.4h

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 September: 11.3h

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 September
Morro Bay, CA

Average sunshine days in September - Morro Bay, CA
  • Average sunshine days in September: 28.1 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 September
Morro Bay, CA

Average UV index in September - Morro Bay, CA
  • Average UV index in September: 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 September
Morro Bay, CA

Average cloud cover in September - Morro Bay, CA
  • Average cloud cover in September: 7

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 September
Morro Bay, CA

Average visibility in September - Morro Bay, CA
  • Average visibility in September: 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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