December weather forecast and climate
San Andreas, CA

Weather in December

The first month of the winter, December, is also a fresh month in San Andreas, California, with average temperature varying between 37.8°F (3.2°C) and 53.6°F (12°C).

Temperature

December is the coldest month, with an average high-temperature of 53.6°F (12°C) and an average low-temperature of 37.8°F (3.2°C).

Humidity

In San Andreas, California, the average relative humidity is 68%.

Rainfall

In San Andreas, California, it is raining for 9.1 days, with typically 2.95" (75mm) of accumulated 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

The month with the shortest days is December, with an average of 9.6h of daylight.

Sunshine

December has the least sunshine of the year in San Andreas, California, with an average of 6h of sunshine.

UV index

Months with the lowest UV index in San Andreas are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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 coldest month in San Andreas?

December is the coldest month, with an average high-temperature of 53.6°F (12°C) and an average low-temperature of 37.8°F (3.2°C).

What is the temperature in December in San Andreas?

The average high-temperature, in December, in San Andreas, California, is 53.6°F (12°C), while the average low-temperature is 37.8°F (3.2°C).

What is the average humidity in December in San Andreas?

The average relative humidity in December is 68%.

How much does it rain in San Andreas in December?

In December, in San Andreas, the rain falls for 9.1 days. Throughout December, 2.95" (75mm) of precipitation is accumulated.

What is the month with the shortest days in San Andreas?

December has the shortest days of the year in San Andreas, California, with an average of 9.6h of daylight.

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

In December, the average length of the day in San Andreas is 9.6h.

What is the month with the least sunshine in San Andreas?

The month with the least sunshine in San Andreas is December, with an average of 6h of sunshine.

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

The average sunshine in December in San Andreas is 6h.

What is the month with the lowest UV index in San Andreas?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in San Andreas.

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

The average daily maximum UV index in December in San Andreas, California, is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in December
San Andreas, CA

Average temperature in December - San Andreas, CA
  • Average high temperature in December: 53.6°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 December: 37.8°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 December
San Andreas, CA

Average pressure in December - San Andreas, CA
  • Average pressure in December: 30.13"

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 December
San Andreas, CA

Average wind speed in December - San Andreas, CA
  • Average wind speed in December: 4.7mph

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 December
San Andreas, CA

Average humidity in December - San Andreas, CA
  • Average humidity in December: 68%

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 December
San Andreas, CA

Average rainfall in December - San Andreas, CA
  • Average rainfall in December: 2.95"

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 December
San Andreas, CA

Average rainfall days in December - San Andreas, CA
  • Average rainfall days in December: 9.1 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 December /
Average sunshine in December
San Andreas, CA

Average daylight in December / Average sunshine in December - San Andreas, CA
  • Average daylight in December: 9.6h

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 December: 6h

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 December
San Andreas, CA

Average sunshine days in December - San Andreas, CA
  • Average sunshine days in December: 20.9 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 December
San Andreas, CA

Average UV index in December - San Andreas, CA
  • Average UV index in December: 3

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 December
San Andreas, CA

Average cloud cover in December - San Andreas, CA
  • Average cloud cover in December: 32

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 December
San Andreas, CA

Average visibility in December - San Andreas, CA
  • Average visibility in December: 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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