September weather forecast and climate
Bonita, CA

Weather in September

The first month of the autumn, September, is still a warm month in Bonita, California, with average temperature fluctuating between 65.5°F (18.6°C) and 78.3°F (25.7°C).

Temperature

In Bonita, California, the average high-temperature in September is essentially the same as in August - a still warm 78.3°F (25.7°C). The average low-temperature, in Bonita, is 65.5°F (18.6°C).

Humidity

The average relative humidity in Bonita is 66%.

Rainfall

In September, in Bonita, California, the rain falls for 3.5 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. In Bonita, California, during the entire year, the rain falls for 51 days and collects up to 5.63" (143mm) of precipitation.

Daylight

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

Sunshine

The average sunshine in September is 10.3h.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
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 Bonita?

In Bonita, in September, the average high-temperature is 78.3°F (25.7°C), and the average low-temperature is 65.5°F (18.6°C).

What is the average humidity in September in Bonita?

The average relative humidity in September is 66%.

How much does it rain in Bonita in September?

In Bonita, in September, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated.

How many hours of daylight does Bonita have in September?

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

How many hours of sunshine does Bonita have in September?

In September, the average sunshine is 10.3h.

What is the month with the highest UV index in Bonita?

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

What is the UV index reading in September in Bonita?

In Bonita, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Bonita, CA

Average temperature in September - Bonita, CA
  • Average high temperature in September: 78.3°F

The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (63.7°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).

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Average pressure in September
Bonita, CA

Average pressure in September - Bonita, CA
  • Average pressure in September: 29.88"

The month with the highest atmospheric pressure is January (30.09").
Months with the lowest atmospheric pressure are June and September (29.88").

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Average wind speed in September
Bonita, CA

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

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is October (5mph).

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Average humidity in September
Bonita, CA

Average humidity in September - Bonita, CA
  • Average humidity in September: 66%

The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (58%).

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Average rainfall in September
Bonita, CA

Average rainfall in September - Bonita, CA
  • Average rainfall in September: 0.28"

The wettest month (with the highest rainfall) is February (1.1").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in September
Bonita, CA

Average rainfall days in September - Bonita, CA
  • Average rainfall days in September: 3.5 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (1.7 days).

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

Average daylight in September / Average sunshine in September - Bonita, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 10.3h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in September
Bonita, CA

Average sunshine days in September - Bonita, CA
  • Average sunshine days in September: 24.8 days

The month with the most sunshine days is June (27.2 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index in September
Bonita, CA

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

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in September
Bonita, CA

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

Months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in September
Bonita, CA

Average visibility in September - Bonita, 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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