September weather forecast
Biola, CA

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Weather in September

September, the first month of the autumn in Biola, is also a hot month, with an average temperature fluctuating between 93.6°F (34.2°C) and 63.5°F (17.5°C).

Temperature

As August makes way for September, Biola's average high-temperature eases from a sweltering 100°F (37.8°C) to a hot 93.6°F (34.2°C). Biola's September nights cool down significantly from the day's heat, to an average low-temperature of 63.5°F (17.5°C).

Humidity

In Biola, the average relative humidity in September is 33%.

Rainfall

In Biola, in September, during 1.5 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. In Biola, during the entire year, the rain falls for 47.3 days and collects up to 5.67" (144mm) of precipitation.

Daylight

In Biola, California, the average length of the day in September is 12h and 24min.
On the first day of September in Biola, sunrise is at 6:31 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm PDT.

Sunshine

The average sunshine in September in Biola is 11.3h.

UV index

In Biola, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 6 during September translates into these guidelines:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
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Frequently asked questions

How hot is it in Biola in September?

The high-temperature during September is 93.6°F (34.2°C) and the low-temperature is 63.5°F (17.5°C). In May, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 82.4°F (28°C).

What is the average humidity in September in Biola?

The average relative humidity in September is 33%.

How many days does it rain in September in Biola?

In September, the rain falls for 1.5 days. Throughout September, 0.08" (2mm) of precipitation is accumulated.

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

The average day length in September is 12h and 24min.

When are sunrise and sunset in September in Biola?

On the first day of September in Biola, sunrise is at 6:31 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm PDT.

How many hours of sunshine does Biola have in September?

The average sunshine duration in September in Biola, California, is 11.3h.

How high is the UV index in September in Biola?

In September, the average daily maximum UV index in Biola, California, is 6. A UV Index value of 6 to 7 symbolizes a high 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
Biola, CA

Average temperature in September - Biola, CA
  • Average high temperature in September: 93.6°F

The warmest month (with the highest average high temperature) is July (102°F).
The month with the lowest average high temperature is December (57°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is December (42.6°F).

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Average pressure in September
Biola, CA

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in September
Biola, CA

Average wind speed in September - Biola, CA
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is June (7.8mph).
The calmest months (with the lowest average wind speed) are January and November (5mph).

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Average humidity in September
Biola, CA

Average humidity in September - Biola, CA
  • Average humidity in September: 33%

The month with the highest relative humidity is January (67%).
The month with the lowest relative humidity is July (29%).

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Average rainfall in September
Biola, CA

Average rainfall in September - Biola, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is February (1.02").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in September
Biola, CA

Average rainfall days in September - Biola, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is August (1 days).

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

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

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 11h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

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Average sunshine days in September
Biola, CA

Average sunshine days in September - Biola, CA
  • Average sunshine days in September: 27.8 days

The month with the most sunshine days is August (28.5 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in September
Biola, CA

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

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

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Average cloud cover in September
Biola, CA

Average cloud cover in September - Biola, CA
  • Average cloud cover in September: 5

The months with the most cloud cover are March and December (Cloud cover 29).
The months with the least cloud cover are July, August and September (Cloud cover 5).

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Average visibility in September
Biola, CA

Average visibility in September - Biola, 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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Biola, California, USA

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