September weather forecast and climate
San Andreas, CA

Weather in September

The first month of the autumn, September, is still a warm month in San Andreas, California, with average temperature ranging between max 85.6°F (29.8°C) and min 57°F (13.9°C).

Temperature

In September, the average high-temperature is practically the same as in August - a warm 85.6°F (29.8°C). The average low-temperature, in September, is 57°F (13.9°C).

Humidity

The average relative humidity in San Andreas is 39%.

Rainfall

In San Andreas, during September, the rain falls for 3.3 days and regularly aggregates up to 0.2" (5mm) of precipitation. In San Andreas, during the entire year, the rain falls for 73.3 days and collects up to 16.42" (417mm) of precipitation.

Daylight

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

Sunshine

The average sunshine in September is 11.3h.

UV index

In September, the average daily maximum UV index in San Andreas is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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 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 temperature in September in San Andreas?

In San Andreas, California, in September, the average high-temperature is 85.6°F (29.8°C), and the average low-temperature is 57°F (13.9°C).

What is the average humidity in September in San Andreas?

In September, the average relative humidity is 39%.

How many days does it rain in September in San Andreas?

In September, the rain falls for 3.3 days. Throughout September, 0.2" (5mm) of precipitation is accumulated.

How many hours of daylight does San Andreas have in September?

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

How many hours of sunshine does San Andreas have in September?

In September, the average sunshine in San Andreas is 11.3h.

What is the UV index reading in September in San Andreas?

The average daily maximum UV index in September in San Andreas is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
San Andreas, CA

Average temperature in September - San Andreas, CA
  • Average high temperature in September: 85.6°F

The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (53.6°F).

  • Average low temperature in September: 57°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (37.8°F).

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Average pressure in September
San Andreas, CA

Average pressure in September - San Andreas, CA
  • Average pressure in September: 29.93"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in September
San Andreas, CA

Average wind speed in September - San Andreas, CA
  • Average wind speed in September: 4.4mph

The windiest month (with the highest average wind speed) is February (5.6mph).
The calmest months (with the lowest average wind speed) are August and September (4.4mph).

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Average humidity in September
San Andreas, CA

Average humidity in September - San Andreas, CA
  • Average humidity in September: 39%

The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (37%).

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Average rainfall in September
San Andreas, CA

Average rainfall in September - San Andreas, CA
  • Average rainfall in September: 0.2"

The wettest month (with the highest rainfall) is March (3.39").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in September
San Andreas, CA

Average rainfall days in September - San Andreas, CA
  • Average rainfall days in September: 3.3 days

The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (1.7 days).

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Average daylight in September /
Average sunshine in September
San Andreas, CA

Average daylight in September / Average sunshine in September - San Andreas, 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: 11.3h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average sunshine days in September
San Andreas, CA

Average sunshine days in September - San Andreas, CA
  • Average sunshine days in September: 26.4 days

The month with the most sunshine days is July (28.2 days).
The month with the least sunshine days is March (16.9 days).

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Average UV index in September
San Andreas, CA

Average UV index in September - San Andreas, CA
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
San Andreas, CA

Average cloud cover in September - San Andreas, CA
  • Average cloud cover in September: 7

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in September
San Andreas, CA

Average visibility in September - San Andreas, 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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