September weather forecast and climate
Port Hueneme, CA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Port Hueneme, California, with average temperature varying between 73.4°F (23°C) and 63°F (17.2°C).

Temperature

August and September, with an average high-temperature of 73.4°F (23°C), are the warmest months.

Humidity

The average relative humidity in September is 65%.

Rainfall

In Port Hueneme, it is raining for 3 days, with typically 0.16" (4mm) of accumulated precipitation. Throughout the year, there are 46.5 rainfall days, and 8.31" (211mm) of precipitation is accumulated.

Ocean temperature

In Port Hueneme, the average seawater temperature is 63.3°F (17.4°C).
Note: Swimming in 63.3°F (17.4°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

In September, the average length of the day in Port Hueneme is 12.4h.

Sunshine

The average sunshine is 10.9h.

UV index

The average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Port Hueneme?

August and September, with an average high-temperature of 73.4°F (23°C), are warmest months.

What is the temperature in September in Port Hueneme?

The average high-temperature, in September, in Port Hueneme, California, is 73.4°F (23°C), while the average low-temperature is 63°F (17.2°C).

What is the average humidity in September in Port Hueneme?

The average relative humidity in September is 65%.

How many days does it rain in September in Port Hueneme?

In Port Hueneme, during September, the rain falls for 3 days and regularly aggregates up to 0.16" (4mm) of precipitation.

What is the ocean temperature in September in Port Hueneme?

In Port Hueneme, California, the average seawater temperature in September is 63.3°F (17.4°C). For swimming, a surface water temperature of 63.3°F (17.4°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).

What is the average length of the day in September in Port Hueneme?

In Port Hueneme, the average length of the day in September is 12.4h.

How many hours of sunshine does Port Hueneme have in September?

In September, the average sunshine is 10.9h.

What is the UV index intensity in September in Port Hueneme?

In September, the average daily maximum UV index in Port Hueneme, California, is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Port Hueneme, CA

Average temperature in September - Port Hueneme, CA
  • Average high temperature in September: 73.4°F

The warmest months (with the highest average high temperature) are August and September (73.4°F).
The month with the lowest average high temperature is February (59°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is September (63°F).
The coldest months (with the lowest average low temperature) are February and December (50.5°F).

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Average pressure in September
Port Hueneme, CA

Average pressure in September - Port Hueneme, CA
  • Average pressure in September: 29.9"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is September (29.9").

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Average wind speed in September
Port Hueneme, CA

Average wind speed in September - Port Hueneme, CA
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in September
Port Hueneme, CA

Average humidity in September - Port Hueneme, CA
  • Average humidity in September: 65%

The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (57%).

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Average rainfall in September
Port Hueneme, CA

Average rainfall in September - Port Hueneme, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is January (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in September
Port Hueneme, CA

Average rainfall days in September - Port Hueneme, CA
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is August (1.3 days).

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Average sea temperature in September
Port Hueneme, CA

Average sea temperature in September - Port Hueneme, CA
  • Average sea temperature in September: 63.3°F

The best month for swimming (with the highest average sea temperature) is August (64.1°F).
The coldest month (with the lowest average sea temperature) is April (56.7°F).

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Average daylight in September /
Average sunshine in September
Port Hueneme, CA

Average daylight in September / Average sunshine in September - Port Hueneme, 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: 10.9h

Months with the most sunshine are June, July and August (Average sunshine: 12h).
Months with the least sunshine are January and February (Average sunshine: 6.8).

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Average sunshine days in September
Port Hueneme, CA

Average sunshine days in September - Port Hueneme, CA
  • Average sunshine days in September: 24.1 days

The month with the most sunshine days is October (27.2 days).
The month with the least sunshine days is February (21.7 days).

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Average UV index in September
Port Hueneme, CA

Average UV index in September - Port Hueneme, CA
  • Average UV index in September: 5

The month with the highest UV index is August (UV index 6).
Months with the lowest UV index are January, February, March, April, November and December (UV index 4).

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Average cloud cover in September
Port Hueneme, CA

Average cloud cover in September - Port Hueneme, CA
  • Average cloud cover in September: 7

The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in September
Port Hueneme, CA

Average visibility in September - Port Hueneme, 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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