September weather forecast and climate
Bolinas, CA

Weather in September

The first month of the autumn, September, is still a pleasant month in Bolinas, California, with average temperature fluctuating between 70.9°F (21.6°C) and 56.3°F (13.5°C).

Temperature

September is the warmest month, with an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 56.3°F (13.5°C).

Humidity

In Bolinas, the average relative humidity in September is 73%.

Rainfall

In September, the rain falls for 3.4 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. In Bolinas, during the entire year, the rain falls for 80.3 days and collects up to 15.98" (406mm) of precipitation.

Snowfall

In Bolinas snow does not fall in January through November.

Ocean temperature

The month with the warmest seawater is September, with an average ocean temperature of 56.8°F (13.8°C).
Note: Swimming in 56.8°F (13.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

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

Sunshine

The average sunshine in September is 10.5h.

UV index

Months with the highest UV index are June through September, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Bolinas?

September is the warmest month in Bolinas, California, with an average high-temperature of 70.9°F (21.6°C) and an average low-temperature of 56.3°F (13.5°C).

What is the temperature in September in Bolinas?

In Bolinas, in September, the average high-temperature is 70.9°F (21.6°C), and the average low-temperature is 56.3°F (13.5°C).

What is the average humidity in September in Bolinas?

In September, the average relative humidity in Bolinas, California, is 73%.

How much does it rain in Bolinas in September?

In Bolinas, California, in September, during 3.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

When it does not snow in Bolinas?

January through November are months without snowfall.

What is the month with the warmest ocean in Bolinas?

The month with the warmest seawater in Bolinas is September, with an average ocean temperature of 56.8°F (13.8°C).

How cold is the water in September in Bolinas?

In September, the average ocean temperature in Bolinas is 56.8°F (13.8°C). Swimming in 56.8°F (13.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Bolinas have in September?

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

How long on average sun shines in September in Bolinas?

In September, the average sunshine in Bolinas is 10.5h.

What are the months with the highest UV index in Bolinas?

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

What is the UV index reading in September in Bolinas?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Bolinas, CA

Average temperature in September - Bolinas, CA
  • Average high temperature in September: 70.9°F

The warmest month (with the highest average high temperature) is September (70.9°F).
The month with the lowest average high temperature is December (55.2°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 December (46°F).

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Average pressure in September
Bolinas, CA

Average pressure in September - Bolinas, CA
  • Average pressure in September: 29.92"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in September
Bolinas, CA

Average wind speed in September - Bolinas, CA
  • Average wind speed in September: 6.3mph

The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is November (5.9mph).

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Average humidity in September
Bolinas, CA

Average humidity in September - Bolinas, CA
  • Average humidity in September: 73%

The month with the highest relative humidity is August (78%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in September
Bolinas, CA

Average rainfall in September - Bolinas, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is February (3.43").
The driest months (with the least rainfall) are July and August (0.08").

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Average rainfall days in September
Bolinas, CA

Average rainfall days in September - Bolinas, CA
  • Average rainfall days in September: 3.4 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (2.3 days).

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Average snowfall days in September
Bolinas, CA

Average snowfall days in September - Bolinas, 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 sea temperature in September
Bolinas, CA

Average sea temperature in September - Bolinas, CA
  • Average sea temperature in September: 56.9°F

The best month for swimming (with the highest average sea temperature) is September (56.9°F).
The coldest month (with the lowest average sea temperature) is June (52.4°F).

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

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

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 10.5h

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is December (Average sunshine: 5.6h).

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Average sunshine days in September
Bolinas, CA

Average sunshine days in September - Bolinas, CA
  • Average sunshine days in September: 24.1 days

Months with the most sunshine days are June and July (24.8 days).
The month with the least sunshine days is March (16.6 days).

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Average UV index in September
Bolinas, CA

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

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

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Average cloud cover in September
Bolinas, CA

Average cloud cover in September - Bolinas, CA
  • Average cloud cover in September: 19

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).

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Average visibility in September
Bolinas, CA

Average visibility in September - Bolinas, 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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