Morro Bay
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Morro Bay, CA

The iconic Morro Rock, a famous tourist spot in Morro Bay, California, with an even more scenic view of the yellow sun setting. Blue sky
The iconic Morro Rock, a famous tourist spot in Morro Bay, California, with an even more scenic view of the yellow sun setting. Blue sky
The first month of the autumn, September, is also an agreeable month in Morro Bay, California, with average temperature ranging between min 54.7°F (12.6°C) and max 70.5°F (21.4°C).

Temperature

In September, the average high-temperature is relatively the same as in August - a still agreeable 70.5°F (21.4°C). In Morro Bay, the average low-temperature is 54.7°F (12.6°C).

Rainfall

In Morro Bay, during September, the rain falls for 1.5 days and regularly aggregates up to 0.2" (6.1mm) of precipitation. Throughout the year, there are 49.5 rainfall days, and 17.5" (444.1mm) of precipitation is accumulated.

Ocean temperature

In Morro Bay, the average water temperature 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.

Daylight

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

What is the temperature in September in Morro Bay?

In September, in Morro Bay, the average high-temperature is 70.5°F (21.4°C), and the average low-temperature is 54.7°F (12.6°C).

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

In September, the rain falls for 1.5 days. Throughout September, 0.2" (6.1mm) of precipitation is accumulated.

How cold is the water in September in Morro Bay?

In Morro Bay, California, the average seawater temperature in September is 58.3°F (14.6°C). Swimming in 58.3°F (14.6°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in September in Morro Bay?

In September, the average length of the day in Morro Bay is 12.4h.
Average temperature in September - Morro Bay, CA
  • Average high temperature in September: 70.5°F

The warmest month (with the highest average high temperature) is October (71.4°F).
The month with the lowest average high temperature is December (64.8°F).

  • Average low temperature in September: 54.6°F

The month with the highest average low temperature is August (55.6°F).
The coldest month (with the lowest average low temperature) is December (44.5°F).

Average rainfall in September - Morro Bay, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is February (3.8").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in September - Morro Bay, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is February (9.2 days).
The month with the lowest number of rainy days is July (0.4 days).

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

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).

Average daylight 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 shortest days is December (Average daylight: 9.8h).