September weather forecast and climate
Avocado Heights, CA

Weather in September

September, the first month of the autumn, in Avocado Heights, is still a tropical month, with average temperature varying between 86.2°F (30.1°C) and 64.4°F (18°C).

Temperature

In Avocado Heights, California, the average high-temperature is essentially the same as in August - a still hot 86.2°F (30.1°C). In September, in Avocado Heights, the average low-temperature is 64.4°F (18°C).

Heat index

The average heat index in September is evaluated at a tropical 88.2°F (31.2°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in September is 50%.

Rainfall

In September, in Avocado Heights, California, the rain falls for 2.2 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. In Avocado Heights, during the entire year, the rain falls for 41.3 days and collects up to 5.35" (136mm) of precipitation.

Daylight

In Avocado Heights, the average length of the day in September is 12.4h.

Sunshine

The average sunshine in Avocado Heights is 10.7h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 temperature in September in Avocado Heights?

In September, in Avocado Heights, the average high-temperature is 86.2°F (30.1°C), and the average low-temperature is 64.4°F (18°C). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines both air temperature and relative humidity, is evaluated at 88.2°F (31.2°C).

What is the average humidity in September in Avocado Heights?

In Avocado Heights, California, the average relative humidity in September is 50%.

How many days does it rain in September in Avocado Heights?

In Avocado Heights, during September, the rain falls for 2.2 days and regularly aggregates up to 0.08" (2mm) of precipitation.

What is the average length of the day in September in Avocado Heights?

In September, the average length of the day in Avocado Heights is 12.4h.

How long on average sun shines in September in Avocado Heights?

In Avocado Heights, California, the average sunshine in September is 10.7h.

What is the UV index intensity in September in Avocado Heights?

The average daily maximum UV index in September in Avocado Heights is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.

Average temperature in September
Avocado Heights, CA

Average temperature in September - Avocado Heights, CA
  • Average high temperature in September: 86.2°F

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is December (64.6°F).

  • Average low temperature in September: 64.4°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48°F).

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Average pressure in September
Avocado Heights, CA

Average pressure in September - Avocado Heights, CA
  • Average pressure in September: 29.89"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in September
Avocado Heights, CA

Average wind speed in September - Avocado Heights, CA
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.6mph).

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Average humidity in September
Avocado Heights, CA

Average humidity in September - Avocado Heights, CA
  • Average humidity in September: 50%

Months with the highest relative humidity are May and June (58%).
The month with the lowest relative humidity is November (46%).

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Average rainfall in September
Avocado Heights, CA

Average rainfall in September - Avocado Heights, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is December (1.3").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in September
Avocado Heights, CA

Average rainfall days in September - Avocado Heights, CA
  • Average rainfall days in September: 2.2 days

The month with the highest number of rainy days is March (5.9 days).
The month with the least rainy days is August (1.2 days).

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Average daylight in September /
Average sunshine in September
Avocado Heights, CA

Average daylight in September / Average sunshine in September - Avocado Heights, 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: 10.7h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.8).

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Average sunshine days in September
Avocado Heights, CA

Average sunshine days in September - Avocado Heights, CA
  • Average sunshine days in September: 26.6 days

Months with the most sunshine days are June and August (27.9 days).
The month with the least sunshine days is February (22.3 days).

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Average UV index in September
Avocado Heights, CA

Average UV index in September - Avocado Heights, CA
  • Average UV index in September: 6

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in September
Avocado Heights, CA

Average cloud cover in September - Avocado Heights, CA
  • Average cloud cover in September: 8

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

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Average visibility in September
Avocado Heights, CA

Average visibility in September - Avocado Heights, 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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