September weather forecast
West Carson, CA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in West Carson, California, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 64.2°F (17.9°C).

Temperature

West Carson ushers in September with an average high-temperature of a still moderately hot 77.5°F (25.3°C), showing a close resemblance to the previous month. West Carson usually reports an average low-temperature of 64.2°F (17.9°C) during the month of September.

Humidity

The average relative humidity in September is 66%.

Rainfall

In West Carson, during September, the rain falls for 3.5 days and regularly aggregates up to 0.24" (6mm) of precipitation. Throughout the year, there are 54 rainfall days, and 7.6" (193mm) of precipitation is accumulated.

Daylight

In September, the average length of the day in West Carson is 12h and 22min.
On the first day of September, sunrise is at 6:27 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:38 pm PDT.

Sunshine

The average sunshine in September is 10.5h.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 6 in September transforms into the following instructions:
Guard oneself from overexposure. Defence against sun injury is vital. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

The average high-temperature, in September, in West Carson, is 77.5°F (25.3°C), while the average low-temperature is 64.2°F (17.9°C).

What is the average humidity in September?

In September, the average relative humidity in West Carson is 66%.

How much does it rain in September?

In September, the rain falls for 3.5 days. Throughout September, 0.24" (6mm) of precipitation is accumulated.

What is the average length of the day in September in West Carson?

The average day length in September is 12h and 22min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:27 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:38 pm PDT.

How long on average sun shines in September?

In West Carson, the average sunshine duration in September is 10.5h.

When is the highest UV index?

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

How high is the UV index in September?

In West Carson, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe 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
West Carson, CA

Average temperature in September - West Carson, CA
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is August (78.3°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in September: 64.2°F

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).

Average pressure in September
West Carson, CA

Average pressure in September - West Carson, CA
  • Average pressure in September: 29.9"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).

Average wind speed in September
West Carson, CA

Average wind speed in September - West Carson, CA
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is September (5.1mph).

Average humidity in September
West Carson, CA

Average humidity in September - West Carson, CA
  • Average humidity in September: 66%

The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (57%).

Average rainfall in September
West Carson, CA

Average rainfall in September - West Carson, CA
  • Average rainfall in September: 0.24"

The wettest month (with the highest rainfall) is January (1.42").
The driest month (with the least rainfall) is June (0.12").

Average rainfall days in September
West Carson, CA

Average rainfall days in September - West Carson, CA
  • Average rainfall days in September: 3.5 days

The month with the highest number of rainy days is March (6.9 days).
The month with the least rainy days is June (2.5 days).

Average daylight in September /
Average sunshine in September
West Carson, CA

Average daylight in September / Average sunshine in September - West Carson, CA
  • Average daylight in September: 12h 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 September: 10h and 3min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days in September
West Carson, CA

Average sunshine days in September - West Carson, CA
  • Average sunshine days in September: 21.6 days

The month with the most sunshine days is January (25 days).
The month with the least sunshine days is June (19 days).

Average UV index in September
West Carson, CA

Average UV index in September - West Carson, CA
  • Average UV index in September: 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).

Average cloud cover in September
West Carson, CA

Average cloud cover in September - West Carson, CA
  • Average cloud cover in September: 11

The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 8).

Average visibility in September
West Carson, CA

Average visibility in September - West Carson, 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).

West Carson, California, USA

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