December weather forecast
Azusa, CA

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Weather in December

The first month of the winter, December, is still a refreshing month in Azusa, California, with an average temperature ranging between max 61.7°F (16.5°C) and min 45.9°F (7.7°C).

Temperature

December, on average, is the coldest month, registering a high temperature of 61.7°F (16.5°C) and a low of 45.9°F (7.7°C).

Humidity

In December, the average relative humidity is 52%.

Rainfall

In Azusa, during December, the rain falls for 6.3 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, in Azusa, California, there are 50.5 rainfall days, and 8.35" (212mm) of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

December has the shortest days of the year, with an average of 9h and 54min of daylight.
On the first day of December in Azusa, 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 4:52 pm PST.

Sunshine

February and December, with an average of 6.9h of sunshine, are months with the least sunshine in Azusa.

UV index

December is the month with the lowest UV index in Azusa, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 during December translates into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

What time of the year is the coldest in Azusa?

The coldest period in Azusa, California, tends to be December, when average temperatures fluctuate between a high of 61.7°F (16.5°C) and a low of 45.9°F (7.7°C).

What are the temperatures in Azusa in December?

Azusa in December has an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 45.9°F (7.7°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is computed to be 86°F (30°C).

What is the average humidity in December in Azusa?

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

How many days does it rain in December in Azusa?

In Azusa, in December, during 6.3 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.

When it does not snow in Azusa?

In Azusa, California, snow does not fall in January, March through December.

What is the month with the shortest days in Azusa?

With an average of 9h and 54min of daylight, December has the shortest days of the year in Azusa, California.

How many hours of daylight does Azusa have in December?

In Azusa, the average day length in December is 9h and 55min.

What time are sunrise and sunset in December in Azusa?

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, in Azusa, California, sunrise is at 6:57 am and sunset at 4:52 pm PST.

What are the months with the least sunshine in Azusa?

The months with the least sunshine are February and December, with an average of 6.9h of sunshine.

How long on average sun shines in December in Azusa?

The average sunshine duration in December in Azusa is 6.9h.

What is the month with the lowest UV index in Azusa?

December is the month with the lowest UV index in Azusa, California, with an average maximum UV index of 3.

What is the UV index intensity in December in Azusa?

In December, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Azusa, CA

Average temperature in December - Azusa, CA
  • Average high temperature in December: 61.7°F

The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in December: 45.9°F

The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is December (45.9°F).

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Average pressure in December
Azusa, CA

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

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in December
Azusa, CA

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

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in December
Azusa, CA

Average humidity in December - Azusa, CA
  • Average humidity in December: 52%

The month with the highest relative humidity is May (56%).
The month with the lowest relative humidity is November (45%).

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Average rainfall in December
Azusa, CA

Average rainfall in December - Azusa, CA
  • Average rainfall in December: 1.73"

The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Azusa, CA

Average rainfall days in December - Azusa, CA
  • Average rainfall days in December: 6.3 days

The month with the highest number of rainy days is March (7 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall days in December
Azusa, CA

Average snowfall days in December - Azusa, CA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in December /
Average sunshine in December
Azusa, CA

Average daylight in December / Average sunshine in December - Azusa, 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 month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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Average sunshine days in December
Azusa, CA

Average sunshine days in December - Azusa, CA
  • Average sunshine days in December: 24.1 days

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.3 days).

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Average UV index in December
Azusa, CA

Average UV index in December - Azusa, CA
  • Average UV index in December: 3

The month with the highest UV index is August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Azusa, CA

Average cloud cover in December - Azusa, CA
  • Average cloud cover in December: 21

The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Azusa, CA

Average visibility in December - Azusa, 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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Azusa, California, USA

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