December weather forecast
East Whittier, CA

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Weather in December

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

Temperature

December is the month when East Whittier sees the lowest average temperatures, with a high of 64.8°F (18.2°C) and a low of 50.2°F (10.1°C).

Humidity

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

Rainfall

December is the month with the most rainfall. Rain falls for 4.1 days and accumulates 0.47" (12mm) of precipitation.

Daylight

The month with the shortest days is December, with an average of 9h and 54min of daylight.
On the first day of December, 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

January, February and December, with an average of 6.8h of sunshine, are months with the least 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 of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 4 in December leads to these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Aug 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

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

What is the usual temperature for East Whittier in December?

An average high-temperature, in December, in East Whittier, is 64.8°F (18.2°C) and the average low-temperature is 50.2°F (10.1°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in September is estimated at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 52%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 4.1 days and accumulates 0.47" (12mm) of precipitation.

How many days does it rain in December?

In East Whittier, during December, the rain falls for 4.1 days and regularly aggregates up to 0.47" (12mm) of precipitation.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length is 9h and 56min.

When is the sunrise / sunset in December?

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 is the month with the least sunshine?

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

How long on average sun shines in December?

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

What are the months with the lowest UV index?

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 December, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
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).

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).

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).

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%).

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").

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).

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).

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).

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).

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).

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).

East Whittier, California, USA

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