September weather forecast
Laguna Beach, CA

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The scenic Three Arch Bay spot on Laguna Beach in California
The scenic Three Arch Bay spot on Laguna Beach in California

Weather in September

The first month of the autumn, September, is also a moderately hot month in Laguna Beach, California, with an average temperature varying between 63.1°F (17.3°C) and 77.4°F (25.2°C).

Temperature

Laguna Beach's warmest month, September, generally records average temperatures ranging from a high of 77.4°F (25.2°C) to a low of 63.1°F (17.3°C).

Humidity

In September, the average relative humidity is 68%.

Rainfall

In Laguna Beach, in September, it is raining for 5.6 days, with typically 0.39" (10mm) of accumulated precipitation. In Laguna Beach, during the entire year, the rain falls for 69 days and collects up to 9.09" (231mm) of precipitation.

Ocean temperature

In September, the average ocean temperature is 66.7°F (19.3°C).
Note: Most people do not find swimming enjoyable in water of 66.7°F (19.3°C). The task of controlling breathing becomes tougher as the temperature drops from 69.8°F (21°C) to 59°F (15°C).

Daylight

In Laguna Beach, the average length of the day in September is 12h and 22min.
On the first day of September in Laguna Beach, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:36 pm PDT.

Sunshine

The average sunshine in September is 10.3h.

UV index

July 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 health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest in Laguna Beach?

With average high and low temperatures of 77.4°F (25.2°C) and 63.1°F (17.3°C) respectively, September is Laguna Beach's warmest month.

What is the temperature in September?

September temperatures vary between a high-temperature of 77.4°F (25.2°C) and a low-temperature of 63.1°F (17.3°C).

What is the average humidity in September in Laguna Beach?

The average relative humidity in September is 68%.

How many days does it rain in September?

In Laguna Beach, in September, during 5.6 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

How cold is the water in September?

In Laguna Beach, the average seawater temperature in September is 66.7°F (19.3°C). For swimming, a surface water temperature of 66.7°F (19.3°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).

How many hours of daylight does Laguna Beach have in September?

In Laguna Beach, the average day length in September is 12h and 22min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:36 pm PDT.

How many hours of sunshine does Laguna Beach have in September?

In Laguna Beach, the average sunshine duration in September is 10.3h.

What are the months with the highest UV index?

The months with the highest UV index are July through September, with an average maximum UV index of 6.

How high is the UV index in September?

In Laguna Beach, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Laguna Beach, CA

Average temperature in September - Laguna Beach, CA
  • Average high temperature in September: 77.4°F

The warmest month (with the highest average high temperature) is September (77.4°F).
The month with the lowest average high temperature is December (62.4°F).

  • Average low temperature in September: 63.1°F

The month with the highest average low temperature is August (63.3°F).
The coldest month (with the lowest average low temperature) is February (50°F).

Average pressure in September
Laguna Beach, CA

Average pressure in September - Laguna Beach, CA
  • Average pressure in September: 29.89"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in September
Laguna Beach, CA

Average wind speed in September - Laguna Beach, CA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (5mph).

Average humidity in September
Laguna Beach, CA

Average humidity in September - Laguna Beach, CA
  • Average humidity in September: 68%

The month with the highest relative humidity is June (74%).
The month with the lowest relative humidity is November (59%).

Average rainfall in September
Laguna Beach, CA

Average rainfall in September - Laguna Beach, CA
  • Average rainfall in September: 0.39"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.12").

Average rainfall days in September
Laguna Beach, CA

Average rainfall days in September - Laguna Beach, CA
  • Average rainfall days in September: 5.6 days

The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (3 days).

Average sea temperature in September
Laguna Beach, CA

Average sea temperature in September - Laguna Beach, CA
  • Average sea temperature in September: 66.8°F

The best months for swimming (with the highest average sea temperature) are July and August (67.7°F).
The coldest month (with the lowest average sea temperature) is January (58.5°F).

Average daylight in September /
Average sunshine in September
Laguna Beach, CA

Average daylight in September / Average sunshine in September - Laguna Beach, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in September
Laguna Beach, CA

Average sunshine days in September - Laguna Beach, CA
  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is January (24.7 days).
The month with the least sunshine days is May (19.5 days).

Average UV index in September
Laguna Beach, CA

Average UV index in September - Laguna Beach, CA
  • Average UV index in September: 6

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

Average cloud cover in September
Laguna Beach, CA

Average cloud cover in September - Laguna Beach, CA
  • Average cloud cover in September: 14

The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 11).

Average visibility in September
Laguna Beach, CA

Average visibility in September - Laguna Beach, 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).

Laguna Beach, California, USA

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