September weather forecast and climate
Manhattan Beach, CA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Manhattan Beach, California, with temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 76.5°F (24.7°C).

Temperature

In Manhattan Beach, California, the average high-temperature in September is practically the same as in August - a still warm 76.5°F (24.7°C). The average low-temperature, in September, is 64.2°F (17.9°C).

Humidity

In September, the average relative humidity in Manhattan Beach is 67%.

Rainfall

In Manhattan Beach, California, during September, the rain falls for 3.5 days and regularly aggregates up to 0.28" (7mm) of precipitation. In Manhattan Beach, during the entire year, the rain falls for 54.5 days and collects up to 7.91" (201mm) of precipitation.

Ocean temperature

In Manhattan Beach, California, the average seawater 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 Manhattan Beach is 12.4h.

Sunshine

In Manhattan Beach, California, the average sunshine is 10.4h.

UV index

July through September, with an average maximum UV index of 6, are months with the highest UV index in Manhattan Beach. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Manhattan Beach?

The average high-temperature, in September, in Manhattan Beach, is 76.5°F (24.7°C), while the average low-temperature is 64.2°F (17.9°C).

What is the average humidity in September in Manhattan Beach?

In Manhattan Beach, the average relative humidity in September is 67%.

How many days does it rain in September in Manhattan Beach?

In Manhattan Beach, California, in September, it is raining for 3.5 days, with typically 0.28" (7mm) of accumulated precipitation.

What is the ocean temperature in September in Manhattan Beach?

In September, the average ocean temperature in Manhattan Beach is 66.7°F (19.3°C). For most, swimming in 66.7°F (19.3°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 Manhattan Beach have in September?

The average length of the day in September in Manhattan Beach, California, is 12.4h.

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

In Manhattan Beach, the average sunshine in September is 10.4h.

When is the highest UV index in Manhattan Beach?

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

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

In Manhattan Beach, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.

Average temperature in September
Manhattan Beach, CA

Average temperature in September - Manhattan Beach, CA
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in September: 64.2°F

Months with the highest average low temperature are August and September (64.2°F).
The coldest month (with the lowest average low temperature) is February (52.2°F).

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Average pressure in September
Manhattan Beach, CA

Average pressure in September - Manhattan Beach, CA
  • Average pressure in September: 29.9"

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

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Average wind speed in September
Manhattan Beach, CA

Average wind speed in September - Manhattan Beach, CA
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).

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Average humidity in September
Manhattan Beach, CA

Average humidity in September - Manhattan Beach, CA
  • Average humidity in September: 67%

The month with the highest relative humidity is June (74%).
The month with the lowest relative humidity is November (57%).

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Average rainfall in September
Manhattan Beach, CA

Average rainfall in September - Manhattan Beach, CA
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is January (1.5").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in September
Manhattan Beach, CA

Average rainfall days in September - Manhattan Beach, CA
  • Average rainfall days in September: 3.5 days

The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is August (3 days).

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Average sea temperature in September
Manhattan Beach, CA

Average sea temperature in September - Manhattan Beach, CA
  • Average sea temperature in September: 66.7°F

The best months for swimming (with the highest average sea temperature) are July and August (67.9°F).
The coldest month (with the lowest average sea temperature) is January (58.3°F).

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

Average daylight in September / Average sunshine in September - Manhattan 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: 9.9h).

  • Average sunshine in September: 10.4h

The month with the most sunshine is August (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in September
Manhattan Beach, CA

Average sunshine days in September - Manhattan Beach, CA
  • Average sunshine days in September: 22.3 days

Months with the most sunshine days are January and October (24.9 days).
The month with the least sunshine days is June (19.6 days).

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Average UV index in September
Manhattan Beach, CA

Average UV index in September - Manhattan 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
Manhattan Beach, CA

Average cloud cover in September - Manhattan Beach, CA
  • Average cloud cover in September: 12

Months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 9).

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Average visibility in September
Manhattan Beach, CA

Average visibility in September - Manhattan 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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