August weather forecastMorro Bay, CA

August
Weather in August
August, the last month of the summer in Morro Bay, is also a moderately hot month, with an average temperature varying between 76.1°F (24.5°C) and 59.5°F (15.3°C).Temperature
The beginning of August records an average high-temperature of a still warm 76.1°F (24.5°C), almost echoing the conditions of the previous month. Throughout August, Morro Bay's nights cool down to an average of 59.5°F (15.3°C).Humidity
In Morro Bay, California, the average relative humidity in August is 66%.Rainfall
August is the month with the least rainfall. Rain falls for 0.7 days and accumulates 0.04" (1mm) of precipitation.Ocean temperature
August and October, with an average ocean temperature of 58.6°F (14.8°C), are months with the warmest seawater.Note: It is advised against swimming in 58.6°F (14.8°C) when it drops below 50°F (10°C). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
In Morro Bay, the average length of the day in August is 13h and 27min.On the first day of August, sunrise is at 6:12 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:31 pm PDT.
Sunshine
In August, the average sunshine is 11.9h.UV index
The month with the highest UV index is August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 6 in August interprets into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Morro Bay, CA
- Average high temperature in August: 76.1°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 August: 59.5°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 August
Morro Bay, CA
- Average pressure in August: 29.92"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 August
Morro Bay, CA
- Average wind speed in August: 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 August
Morro Bay, CA
- Average humidity in August: 66%
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 August
Morro Bay, CA
- Average rainfall in August: 0.04"
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 August
Morro Bay, CA
- Average rainfall days in August: 0.7 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 August
Morro Bay, CA
- Average sea temperature in August: 58.6°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 August /
Average sunshine in August
Morro Bay, CA
- Average daylight in August: 13h and 24min
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 August: 11h and 54min
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 August
Morro Bay, CA
- Average sunshine days in August: 28.8 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).
Average UV index in August
Morro Bay, CA
- Average UV index in August: 6
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 August
Morro Bay, CA
- Average cloud cover in August: 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 August
Morro Bay, CA
- Average visibility in August: 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).





