September weather forecast and climate
Laguna Beach, CA

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 still a warm month in Laguna Beach, California, with average temperature fluctuating between 77.4°F (25.2°C) and 63.1°F (17.3°C).

Temperature

September is the warmest month, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 63.1°F (17.3°C).

Humidity

In Laguna Beach, the average relative humidity is 68%.

Rainfall

In Laguna Beach, during September, the rain falls for 5.6 days and regularly aggregates up to 0.39" (10mm) of 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 Laguna Beach, the average water temperature is 66.7°F (19.3°C).
Note: Swimming in 66.7°F (19.3°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 Laguna Beach is 12.4h.

Sunshine

The average sunshine in September is 10.3h.

UV index

Months with the highest UV index are July through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. 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.
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FAQ

What is the warmest month in Laguna Beach?

With an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 63.1°F (17.3°C), September is the warmest month in Laguna Beach, California.

What is the temperature in September in Laguna Beach?

In Laguna Beach, California, in September, the average high-temperature is 77.4°F (25.2°C), and the average low-temperature is 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, the rain falls for 5.6 days. Throughout September, 0.39" (10mm) of precipitation is accumulated.

How cold is the water in September in Laguna Beach?

In Laguna Beach, California, in September, the average water temperature is 66.7°F (19.3°C). Swimming in 66.7°F (19.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

In Laguna Beach, California, the average length of the day in September is 12.4h.

How long on average sun shines in September in Laguna Beach?

The average sunshine in September in Laguna Beach is 10.3h.

What is the month with the highest UV index in Laguna Beach?

Months with the highest UV index in Laguna Beach are July through September, with an average maximum UV index of 6.

What is the UV index intensity in September in Laguna Beach?

The average daily maximum UV index in September in Laguna Beach, California, is 6. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV rays.

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).

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Average pressure in September
Laguna Beach, CA

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

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

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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).

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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%).

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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").

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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).

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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).

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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: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 10.3h

The month with the most sunshine is August (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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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).

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Average UV index in September
Laguna Beach, CA

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

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

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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).

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Average visibility in September
Laguna Beach, CA

Average visibility in September - Laguna Beach, CA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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