September weather forecast and climate
Tarzana, CA

Weather in September

September, the first month of the autumn, in Tarzana, is also a moderately hot month, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 63°F (17.2°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still warm 83.1°F (28.4°C). The average low-temperature, in Tarzana, California, is 63°F (17.2°C).

Heat index

In September, the average heat index is calculated to be 84.4°F (29.1°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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like clothing, differences in body mass, height, and shape, pregnancy, and activity influence one's weather impression. 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

In Tarzana, California, the average relative humidity in September is 52%.

Rainfall

In Tarzana, it is raining for 2.6 days, with typically 0.16" (4mm) of accumulated precipitation. In Tarzana, during the entire year, the rain falls for 42.7 days and collects up to 6.46" (164mm) of precipitation.

Snowfall

In Tarzana snow does not fall in January through November.

Daylight

The average length of the day in Tarzana is 12.4h.

Sunshine

In September, the average sunshine is 10.8h.

UV index

Months with the highest UV index in Tarzana are June through September, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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 Tarzana?

In Tarzana, California, in September, the average high-temperature is 83.1°F (28.4°C), and the average low-temperature is 63°F (17.2°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in September is calculated to be 84.4°F (29.1°C).

What is the average humidity in September in Tarzana?

In Tarzana, California, the average relative humidity in September is 52%.

How much does it rain in Tarzana in September?

In September, in Tarzana, the rain falls for 2.6 days. Throughout September, 0.16" (4mm) of precipitation is accumulated.

When it does not snow in Tarzana?

January through November are months without snowfall in Tarzana, California.

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

The average length of the day in September is 12.4h.

How long on average sun shines in September in Tarzana?

The average sunshine in September in Tarzana, California, is 10.8h.

When is the highest UV index in Tarzana?

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

How high is the UV index in September in Tarzana?

In Tarzana, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Tarzana, CA

Average temperature in September - Tarzana, CA
  • Average high temperature in September: 83.1°F

The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (61.9°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).

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Average pressure in September
Tarzana, CA

Average pressure in September - Tarzana, 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 June (29.89").

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Average wind speed in September
Tarzana, CA

Average wind speed in September - Tarzana, CA
  • Average wind speed in September: 4.5mph

The windiest months (with the highest average wind speed) are January and December (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in September
Tarzana, CA

Average humidity in September - Tarzana, CA
  • Average humidity in September: 52%

The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).

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Average rainfall in September
Tarzana, CA

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

The wettest month (with the highest rainfall) is February (1.22").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in September
Tarzana, CA

Average rainfall days in September - Tarzana, CA
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.4 days).

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Average snowfall days in September
Tarzana, CA

Average snowfall days in September - Tarzana, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in September / Average sunshine in September - Tarzana, 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: 10.8h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in September
Tarzana, CA

Average sunshine days in September - Tarzana, CA
  • Average sunshine days in September: 25.5 days

Months with the most sunshine days are August and October (27.3 days).
The month with the least sunshine days is February (22 days).

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Average UV index in September
Tarzana, CA

Average UV index in September - Tarzana, CA
  • Average UV index in September: 6

Months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Tarzana, CA

Average cloud cover in September - Tarzana, 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 4).

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Average visibility in September
Tarzana, CA

Average visibility in September - Tarzana, 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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