Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With average temperatures fluctuating between a high of 76.3°F (24.6°C) and a low of 59.9°F (15.5°C), September stands out as the warmest month.Humidity
September and October, with an average relative humidity of 61%, are the least humid months.Rainfall
In September, the rain falls for 1.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. In Morro Bay, during the entire year, the rain falls for 53.7 days and collects up to 8.58" (218mm) of precipitation.Ocean temperature
In Morro Bay, the average seawater temperature in September is 58.3°F (14.6°C).Note: With the appropriate swimsuit, one can swim in 58.3°F (14.6°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.
Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:48 pm PDT.
Sunshine
In Morro Bay, California, the average sunshine in September is 11.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 5 suggests this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months?
What are the temperatures in September?
What is the least humid month?
What is the average humidity in September?
How much does it rain in Morro Bay in September?
What is the water temperature in September?
How many hours of daylight does Morro Bay have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Morro Bay have in September?
How high is the UV index in September?
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).
Average pressure in September
Morro Bay, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and September (29.91"Hg).
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).
Average humidity in September
Morro Bay, CA
- Average humidity in September: 61%
The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are September and October (61%).
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").
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).
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).
Average daylight in September /
Average sunshine in September
Morro Bay, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 2min
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 24min).
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).
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).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
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).
The months with the least cloud cover are August and September (Cloud cover 7).
Average visibility in September
Morro Bay, CA
- Average visibility in September: 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).
Morro Bay, California, USA
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