December weather forecast
East Whittier, CA

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Weather in December

December, the first month of the winter in East Whittier, is also an enjoyable month, with an average temperature fluctuating between 64.8°F (18.2°C) and 50.2°F (10.1°C).

Temperature

December is the coldest month of the year, registering average temperatures as high as 64.8°F (18.2°C) and as low as 50.2°F (10.1°C).

Humidity

The average relative humidity in December is 52%.

Rainfall

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

Daylight

December has the shortest days of the year in East Whittier, with an average of 9h and 54min of daylight.
On the first day of December in East Whittier, sunrise is at 6:39 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 4:53 pm PST.

Sunshine

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

UV index

The months with the lowest UV index are February, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 4 in December transforms into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

What time of the year is the coldest in East Whittier?

The month of December sees the average lowest temperatures in East Whittier, California, reaching 64.8°F (18.2°C) at the peak and 50.2°F (10.1°C) at the low.

What are the temperatures in East Whittier in December?

East Whittier in December has an average high-temperature of 64.8°F (18.2°C) and an average low-temperature of 50.2°F (10.1°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 86°F (30°C).

What is the average humidity in December in East Whittier?

The average relative humidity in December in East Whittier, California, is 52%.

What is the rainiest month in East Whittier?

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

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

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

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

December has the shortest days of the year in East Whittier, California, with an average of 9h and 54min of daylight.

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

The average day length in December is 9h and 56min.

When is the sunrise / sunset in December in East Whittier?

In December, on the first day of the month, sunrise is at 6:39 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 4:53 pm PST.

What are the months with the least sunshine in East Whittier?

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

How long on average sun shines in December in East Whittier?

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

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

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

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

In East Whittier, California, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
East Whittier, CA

Average temperature in December - East 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
East Whittier, CA

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

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

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Average wind speed in December
East Whittier, CA

Average wind speed in December - East 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
East Whittier, CA

Average humidity in December - East 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
East Whittier, CA

Average rainfall in December - East 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
East Whittier, CA

Average rainfall days in December - East 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
East Whittier, CA

Average daylight in December / Average sunshine in December - East Whittier, CA
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 6h and 5min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).

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Average sunshine days in December
East Whittier, CA

Average sunshine days in December - East 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
East Whittier, CA

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

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

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Average cloud cover in December
East Whittier, CA

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

The 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
East Whittier, CA

Average visibility in December - East Whittier, CA
  • Average visibility in December: 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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East Whittier, California, USA

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