September weather forecast
Brookdale, CA

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Weather in September

The first month of the autumn, September, is still a pleasant month in Brookdale, California, with an average temperature ranging between min 56.3°F (13.5°C) and max 72.5°F (22.5°C).

Temperature

The onset of September brings an average high-temperature of a still agreeable 72.5°F (22.5°C), nearly matching the August temperature. Brookdale's September nights cool down to an average low-temperature of 56.3°F (13.5°C).

Humidity

The average relative humidity in September is 71%.

Rainfall

In Brookdale, in September, during 3.2 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. Throughout the year, there are 74.2 rainfall days, and 13.82" (351mm) of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 24min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:52 pm PDT.

Sunshine

The average sunshine in September is 11h.

UV index

The months with the highest UV index in Brookdale are June through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 in September interprets into the following advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What is the temperature in September in Brookdale?

The high-temperature, in September, in Brookdale, records 72.5°F (22.5°C), while the low-temperature is 56.3°F (13.5°C).

What is the average humidity in September in Brookdale?

The average relative humidity in September in Brookdale, California, is 71%.

How much does it rain in Brookdale in September?

In Brookdale, California, in September, it is raining for 3.2 days, with typically 0.16" (4mm) of accumulated precipitation.

What is the average length of the day in September in Brookdale?

In Brookdale, California, the average day length in September is 12h and 24min.

When is the sunrise / sunset in September in Brookdale?

On the first day of September in Brookdale, California, sunrise is at 6:39 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm PDT.

How long on average sun shines in September in Brookdale?

The average sunshine duration in September is 11h.

When is the highest UV index in Brookdale?

June through September, with an average maximum UV index of 5, are months with the highest UV index in Brookdale, California.

What is the UV index intensity in September in Brookdale?

In Brookdale, California, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Brookdale, CA

Average temperature in September - Brookdale, CA
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is August (72.9°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is September (56.3°F).
The coldest month (with the lowest average low temperature) is February (46.4°F).

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Average pressure in September
Brookdale, CA

Average pressure in September - Brookdale, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

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Average wind speed in September
Brookdale, CA

Average wind speed in September - Brookdale, CA
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in September
Brookdale, CA

Average humidity in September - Brookdale, CA
  • Average humidity in September: 71%

The month with the highest relative humidity is March (76%).
The months with the lowest relative humidity are October and November (69%).

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Average rainfall in September
Brookdale, CA

Average rainfall in September - Brookdale, CA
  • Average rainfall in September: 0.16"

The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.04").

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Average rainfall days in September
Brookdale, CA

Average rainfall days in September - Brookdale, CA
  • Average rainfall days in September: 3.2 days

The month with the highest number of rainy days is March (13.3 days).
The months with the least rainy days are June and August (1.4 days).

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Average daylight in September /
Average sunshine in September
Brookdale, CA

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 11h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in September
Brookdale, CA

Average sunshine days in September - Brookdale, CA
  • Average sunshine days in September: 24.3 days

The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is March (16.6 days).

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Average UV index in September
Brookdale, CA

Average UV index in September - Brookdale, CA
  • Average UV index in September: 5

The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in September
Brookdale, CA

Average cloud cover in September - Brookdale, CA
  • Average cloud cover in September: 12

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in September
Brookdale, CA

Average visibility in September - Brookdale, 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).

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Brookdale, California, USA

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