August weather forecast
Santa Monica, CA

Share
The neon-lit fun park in Santa Monica, California, with a view of the iconic Ferris wheel and pier
The neon-lit fun park in Santa Monica, California, with a view of the iconic Ferris wheel and pier

Weather in August

The last month of the summer, August, is another warm month in Santa Monica, California, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 64.4°F (18°C).

Temperature

With average high and low temperatures of 80.8°F (27.1°C) and 64.4°F (18°C) respectively, August is Santa Monica's warmest month.

Heat index

The heat index for August is estimated at 82.4°F (28°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

The average relative humidity in August is 63%.

Rainfall

June and August are months with the least rain when the rain falls for 1.8 days and typically aggregates up to 0.08" (2mm) of rain.

Ocean temperature

The months with the warmest seawater are August through October, with an average ocean temperature of 66.2°F (19°C).
Note: For swimming, a surface water temperature of 66.2°F (19°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

In Santa Monica, California, the average length of the day in August is 13h and 23min.
On the first day of August in Santa Monica, sunrise is at 6:06 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:20 pm PDT.

Sunshine

The months with the most sunshine are July and August, with an average of 11.9h of sunshine.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 6 in August suggests the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
[Resources]

Frequently asked questions

What part of the year is the hottest in Santa Monica?

The warmest time of the year in Santa Monica is August, with temperatures averaging a high of 80.8°F (27.1°C) and a low of 64.4°F (18°C).

What is the average August temperature in Santa Monica?

In August, in Santa Monica, the average high-temperature is 80.8°F (27.1°C), and the average low-temperature is 64.4°F (18°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 82.4°F (28°C).

What is the average humidity in August in Santa Monica?

The average relative humidity in August in Santa Monica, California, is 63%.

What is the driest month in Santa Monica?

June and August are months with the least rain when the rain falls for 1.8 days and typically aggregates up to 0.08" (2mm) of rain.

How much does it rain in Santa Monica in August?

In Santa Monica, California, in August, it is raining for 1.8 days, with typically 0.08" (2mm) of accumulated precipitation.

What are the months with the warmest ocean in Santa Monica?

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

What is the ocean temperature in August in Santa Monica?

In Santa Monica, the average seawater temperature in August 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).

What is the average length of the day in August in Santa Monica?

In Santa Monica, the average day length in August is 13h and 23min.

When is the sunrise / sunset in August in Santa Monica?

On the first day of August in Santa Monica, California, sunrise is at 6:06 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:20 pm PDT.

What is the month with the most sunshine in Santa Monica?

July and August, with an average of 11.9h of sunshine, are months with the most sunshine.

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

In August, the average sunshine duration in Santa Monica, California, is 11.9h.

What are the months with the highest UV index in Santa Monica?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Santa Monica, California.

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

In August, the average daily maximum UV index in Santa Monica is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Santa Monica, CA

Average temperature in August - Santa Monica, CA
  • Average high temperature in August: 80.8°F

The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (63.9°F).

  • Average low temperature in August: 64.4°F

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).

[Resources]

Average pressure in August
Santa Monica, CA

Average pressure in August - Santa Monica, CA
  • Average pressure in August: 29.91"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).

[Resources]

Average wind speed in August
Santa Monica, CA

Average wind speed in August - Santa Monica, CA
  • Average wind speed in August: 4.8mph

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are August and September (4.8mph).

[Resources]

Average humidity in August
Santa Monica, CA

Average humidity in August - Santa Monica, CA
  • Average humidity in August: 63%

The month with the highest relative humidity is June (69%).
The month with the lowest relative humidity is November (52%).

[Resources]

Average rainfall in August
Santa Monica, CA

Average rainfall in August - Santa Monica, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is January (1.54").
The driest months (with the least rainfall) are June and August (0.08").

[Resources]

Average rainfall days in August
Santa Monica, CA

Average rainfall days in August - Santa Monica, CA
  • Average rainfall days in August: 1.8 days

The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is August (1.8 days).

[Resources]

Average sea temperature in August
Santa Monica, CA

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

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

[Resources]

Average daylight in August /
Average sunshine in August
Santa Monica, CA

Average daylight in August / Average sunshine in August - Santa Monica, CA
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in August: 11h and 5min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The months with the least sunshine are February and December (Average sunshine: 6h and 36min).

[Resources]

Average sunshine days in August
Santa Monica, CA

Average sunshine days in August - Santa Monica, CA
  • Average sunshine days in August: 27.9 days

The month with the most sunshine days is August (27.9 days).
The month with the least sunshine days is February (21.8 days).

[Resources]

Average UV index in August
Santa Monica, CA

Average UV index in August - Santa Monica, CA
  • Average UV index in August: 6

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).

[Resources]

Average cloud cover in August
Santa Monica, CA

Average cloud cover in August - Santa Monica, CA
  • Average cloud cover in August: 8

The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 8).

[Resources]

Average visibility in August
Santa Monica, CA

Average visibility in August - Santa Monica, 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).

[Resources]

Santa Monica, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location