December weather forecast and climate
South Whittier, CA

Weather in December

The first month of the winter, December, is also an enjoyable month in South Whittier, California, with average temperature ranging between min 50.2°F (10.1°C) and max 64.8°F (18.2°C).

Temperature

With an average high-temperature of 64.8°F (18.2°C) and an average low-temperature of 50.2°F (10.1°C), December is the coldest month.

Humidity

In December, the average relative humidity is 52%.

Rainfall

The month with the most rainfall is December when the rain falls for 4.1 days and typically aggregates up to 0.47" (12mm) of precipitation.

Daylight

The month with the shortest days is December, with an average of 9.9h of daylight.

Sunshine

January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine.

UV index

Months with the lowest UV index are February, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 4 in December 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 South Whittier?

December is the coldest month, with an average high-temperature of 64.8°F (18.2°C) and an average low-temperature of 50.2°F (10.1°C).

What is the temperature in December in South Whittier?

In South Whittier, in December, the average high-temperature is 64.8°F (18.2°C), and the average low-temperature is 50.2°F (10.1°C).

What is the average humidity in December in South Whittier?

In South Whittier, the average relative humidity in December is 52%.

How many days does it rain in December in South Whittier?

In South Whittier, California, in December, during 4.1 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

What is the rainiest month in South Whittier?

The month with the most rainfall in South Whittier, California, is December when the rain falls for 4.1 days and typically aggregates up to 0.47" (12mm) of precipitation.

What is the month with the shortest days in South Whittier?

The month with the shortest days in South Whittier, California, is December, with an average of 9.9h of daylight.

How many hours of daylight does South Whittier have in December?

In South Whittier, the average length of the day in December is 9.9h.

What is the month with the least sunshine in South Whittier?

Months with the least sunshine are January, February and December, with an average of 6.8h of sunshine.

How many hours of sunshine does South Whittier have in December?

In December, the average sunshine in South Whittier is 6.8h.

What are the months with the lowest UV index in South Whittier?

February, November and December, with an average maximum UV index of 4, are months with the lowest UV index.

What is the UV index intensity in December in South Whittier?

In December, the average daily maximum UV index in South Whittier is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in December
South Whittier, CA

Average temperature in December - South Whittier, CA
  • Average high temperature in December: 64.8°F

The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (64.8°F).

  • Average low temperature in December: 50.2°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (49.8°F).

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Average pressure in December
South Whittier, CA

Average pressure in December - South Whittier, CA
  • Average pressure in December: 30.07"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in December
South Whittier, CA

Average wind speed in December - South Whittier, CA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).

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Average humidity in December
South Whittier, CA

Average humidity in December - South Whittier, CA
  • Average humidity in December: 52%

The month with the highest relative humidity is June (63%).
The month with the lowest relative humidity is November (48%).

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Average rainfall in December
South Whittier, CA

Average rainfall in December - South Whittier, CA
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").

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Average rainfall days in December
South Whittier, CA

Average rainfall days in December - South Whittier, CA
  • Average rainfall days in December: 4.1 days

The month with the highest number of rainy days is March (4.6 days).
The month with the least rainy days is June (0.5 days).

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Average daylight in December /
Average sunshine in December
South Whittier, CA

Average daylight in December / Average sunshine in December - South Whittier, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.8h

Months with the most sunshine are July and August (Average sunshine: 12h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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Average sunshine days in December
South Whittier, CA

Average sunshine days in December - South Whittier, CA
  • Average sunshine days in December: 25.5 days

The month with the most sunshine days is June (29.3 days).
The month with the least sunshine days is February (23.8 days).

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Average UV index in December
South Whittier, CA

Average UV index in December - South Whittier, CA
  • Average UV index in December: 4

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are February, November and December (UV index 4).

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Average cloud cover in December
South Whittier, CA

Average cloud cover in December - South Whittier, CA
  • Average cloud cover in December: 22

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in December
South Whittier, CA

Average visibility in December - South Whittier, 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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