Santa Monica
California, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Santa Monica, CA

A night view of the neon-lit fun park in Santa Monica, California, with a view of the iconic Ferris wheel and pier, all reflected in the seawater below
A night view of the neon-lit fun park in Santa Monica, California, with a view of the iconic Ferris wheel and pier, all reflected in the seawater below
The last month of the summer, August, is another pleasant month in Santa Monica, California, with average temperature fluctuating between 71.1°F (21.7°C) and 63°F (17.2°C).

Temperature

August and September, with an average high-temperature of 71.1°F (21.7°C), are the warmest months.

Rainfall

In Santa Monica, during August, the rain falls for 0.5 days and regularly aggregates up to 0" (1mm) of precipitation. In Santa Monica, California, during the entire year, the rain falls for 32.7 days and collects up to 12.8" (324.9mm) of precipitation.

Ocean temperature

August through October, with an average ocean temperature of 66.2°F (19°C), are months with the warmest seawater.
Note: Swimming in 66.2°F (19°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

The average length of the day in Santa Monica is 13.4h.

Sunshine

The average sunshine in Santa Monica is 11h.

UV index

In Santa Monica, the average daily maximum UV index in August is 10. A UV Index estimate of 8 to 10 represents a very high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 10 interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What are the warmest months in Santa Monica?

Warmest months are August and September, with an average high-temperature of 71.1°F (21.7°C).

What is the temperature in August in Santa Monica?

The average high-temperature, in August, in Santa Monica, is 71.1°F (21.7°C), while the average low-temperature is 63°F (17.2°C).

How much does it rain in Santa Monica in August?

In Santa Monica, California, in August, during 0.5 rainfall days, 0" (1mm) of precipitation is typically accumulated.

When is the ocean warmest in Santa Monica?

August through October, with an average ocean temperature of 66.2°F (19°C), are months with the warmest seawater in Santa Monica.

What is the ocean temperature in August in Santa Monica?

In Santa Monica, in August, the average water temperature is 66.2°F (19°C). For most, swimming in 66.2°F (19°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

How many hours of daylight does Santa Monica have in August?

The average length of the day in August in Santa Monica, California, is 13.4h.

How long on average sun shines in August in Santa Monica?

In August, the average sunshine in Santa Monica is 11h.

What is the UV index reading in August in Santa Monica?

In Santa Monica, California, the average daily maximum UV index in August is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in August - Santa Monica, CA
  • Average high temperature in August: 71°F

Warmest months (with the highest average high temperature) are August and September (71°F).
Months with the lowest average high temperature are February and March (63°F).

  • Average low temperature in August: 63°F

Months with the highest average low temperature are July, August and September (63°F).
Coldest months (with the lowest average low temperature) are January and December (51°F).

Average rainfall in August - Santa Monica, CA
  • Average rainfall in August: 0"

The wettest month (with the highest rainfall) is February (3.4").
Driest months (with the lowest rainfall) are June, July and August (0").

Average rainfall days in August - Santa Monica, CA
  • Average rainfall days in August: 0.5 days

The month with the highest number of rainy days is February (7.9 days).
The month with the lowest number of rainy days is July (0.1 days).

Average sea temperature in August - Santa Monica, CA
  • Average sea temperature in August: 66°F

Best months for swimming (with the highest average sea temperature) are August, September and October (66°F).
Coldest months (with the lowest average sea temperature) are January, February, March, April, May and December (59°F).

Average daylight in August / Average sunshine in August - Santa Monica, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in August: 11h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Average UV index in August - Santa Monica, CA
  • Average UV index in August: 10

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 3).