September weather forecast
El Sobrante, CA

Weather in September

September, the first month of the autumn in El Sobrante, is also a moderately hot month, with temperature in the range of an average low of 56.7°F (13.7°C) and an average high of 77.5°F (25.3°C).

Temperature

The warmest month is September, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 56.7°F (13.7°C).

Humidity

September and October, with an average relative humidity of 63%, are the least humid months in El Sobrante.

Rainfall

In El Sobrante, it is raining for 2.3 days, with typically 0.12" (3mm) of accumulated precipitation. Throughout the year, in El Sobrante, there are 72.2 rainfall days, and 12.83" (326mm) of precipitation is accumulated.

Daylight

In El Sobrante, the average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:39 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:54 pm PDT.

Sunshine

In El Sobrante, the average sunshine in September is 10.9h.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the 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 El Sobrante?

With an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 56.7°F (13.7°C), September is the warmest month.

What is the temperature in September in El Sobrante?

In El Sobrante, in September, the average high-temperature is 77.5°F (25.3°C), and the average low-temperature is 56.7°F (13.7°C).

What are the least humid months in El Sobrante?

The months with the lowest humidity in El Sobrante, California, are September and October, with an average relative humidity of 63%.

What is the average humidity in September in El Sobrante?

The average relative humidity in September in El Sobrante is 63%.

How much does it rain in El Sobrante in September?

In El Sobrante, during September, the rain falls for 2.3 days and regularly aggregates up to 0.12" (3mm) of precipitation.

How many hours of daylight does El Sobrante have in September?

In September, the average day length in El Sobrante is 12h and 25min.

When is the sunrise / sunset in September in El Sobrante?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:54 pm PDT.

How many hours of sunshine does El Sobrante have in September?

In September, the average sunshine duration in El Sobrante, California, is 10.9h.

When is the highest UV index in El Sobrante?

The months with the highest UV index are April through September, with an average maximum UV index of 5.

How high is the UV index in September in El Sobrante?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
El Sobrante, CA

Average temperature in September - El Sobrante, CA
  • Average high temperature in September: 77.5°F

The warmest month (with the highest average high temperature) is September (77.5°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January and December (43.9°F).

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Average pressure in September
El Sobrante, CA

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

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

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Average wind speed in September
El Sobrante, CA

Average wind speed in September - El Sobrante, CA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).

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Average humidity in September
El Sobrante, CA

Average humidity in September - El Sobrante, CA
  • Average humidity in September: 63%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (63%).

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Average rainfall in September
El Sobrante, CA

Average rainfall in September - El Sobrante, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is February (2.76").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in September
El Sobrante, CA

Average rainfall days in September - El Sobrante, CA
  • Average rainfall days in September: 2.3 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (1.1 days).

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Average daylight in September /
Average sunshine in September
El Sobrante, CA

Average daylight in September / Average sunshine in September - El Sobrante, CA
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 46min).
The month with the shortest days is December (Average daylight: 9h and 35min).

  • Average sunshine in September: 10h and 54min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in September
El Sobrante, CA

Average sunshine days in September - El Sobrante, CA
  • Average sunshine days in September: 25.9 days

The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (16.4 days).

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Average UV index in September
El Sobrante, CA

Average UV index in September - El Sobrante, CA
  • Average UV index in September: 5

The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
El Sobrante, CA

Average cloud cover in September - El Sobrante, CA
  • Average cloud cover in September: 13

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 12).

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Average visibility in September
El Sobrante, CA

Average visibility in September - El Sobrante, 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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