September weather forecast and climate
Big Bar, CA

Weather in September

September, the first month of the autumn, in Big Bar, is still a warm month, with average temperature ranging between max 77.9°F (25.5°C) and min 46.2°F (7.9°C).

Temperature

In September, the average high-temperature marginally drops, from 84.6°F (29.2°C) in August, to a still warm 77.9°F (25.5°C). The average low-temperature, in Big Bar, is 46.2°F (7.9°C).

Humidity

In Big Bar, the average relative humidity in September is 57%.

Rainfall

In Big Bar, in September, it is raining for 3.6 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, in Big Bar, California, there are 119.2 rainfall days, and 33.35" (847mm) of precipitation is accumulated.

Snowfall

In Big Bar, California, snow does not fall in May through October.

Daylight

In Big Bar, the average length of the day is 12.4h.

Sunshine

In Big Bar, California, the average sunshine is 10.7h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Big Bar?

In Big Bar, California, in September, the average high-temperature is 77.9°F (25.5°C), and the average low-temperature is 46.2°F (7.9°C).

What is the average humidity in September in Big Bar?

In September, the average relative humidity is 57%.

How many days does it rain in September in Big Bar?

In September, in Big Bar, California, the rain falls for 3.6 days. Throughout September, 0.47" (12mm) of precipitation is accumulated.

When it does not snow in Big Bar?

May through October are months without snowfall.

How many hours of daylight does Big Bar have in September?

The average length of the day in September in Big Bar, California, is 12.4h.

How many hours of sunshine does Big Bar have in September?

The average sunshine in September is 10.7h.

What is the UV index intensity in September in Big Bar?

In Big Bar, California, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Big Bar, CA

Average temperature in September - Big Bar, CA
  • Average high temperature in September: 77.9°F

The warmest months (with the highest average high temperature) are July and August (84.6°F).
The month with the lowest average high temperature is December (45°F).

  • Average low temperature in September: 46.2°F

The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is December (30°F).

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Average pressure in September
Big Bar, CA

Average pressure in September - Big Bar, CA
  • Average pressure in September: 29.95"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is August (29.94").

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Average wind speed in September
Big Bar, CA

Average wind speed in September - Big Bar, CA
  • Average wind speed in September: 3.7mph

The windiest months (with the highest average wind speed) are March and April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).

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Average humidity in September
Big Bar, CA

Average humidity in September - Big Bar, CA
  • Average humidity in September: 57%

The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (54%).

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Average rainfall in September
Big Bar, CA

Average rainfall in September - Big Bar, CA
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is December (6.14").
The driest months (with the least rainfall) are July and August (0.16").

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Average rainfall days in September
Big Bar, CA

Average rainfall days in September - Big Bar, CA
  • Average rainfall days in September: 3.6 days

The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in September
Big Bar, CA

Average snowfall in September - Big Bar, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (8.35").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Big Bar, CA

Average snowfall days in September - Big Bar, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Big Bar, CA

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

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 10.7h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 4.6h).

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Average sunshine days in September
Big Bar, CA

Average sunshine days in September - Big Bar, CA
  • Average sunshine days in September: 24.8 days

The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is March (10.6 days).

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Average UV index in September
Big Bar, CA

Average UV index in September - Big Bar, CA
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Big Bar, CA

Average cloud cover in September - Big Bar, CA
  • Average cloud cover in September: 16

The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 8).

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Average visibility in September
Big Bar, CA

Average visibility in September - Big Bar, CA
  • Average visibility in September: 6mi

Months with the highest visibility are June, July, August, September and October (6mi).
Months with the lowest visibility are March and December (4mi).

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