December weather forecast
Chatsworth, CA

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Weather in December

December, the first month of the winter in Chatsworth, is also an enjoyable month, with an average temperature fluctuating between 46.2°F (7.9°C) and 61.7°F (16.5°C).

Temperature

Chatsworth, California, experiences its lowest average temperatures in December, reaching a peak of 61.7°F (16.5°C) and a minimum of 46.2°F (7.9°C).

Humidity

In December, the average relative humidity is 52%.

Rainfall

In Chatsworth, during December, the rain falls for 5 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, there are 39.8 rainfall days, and 7.52" (191mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 54min of daylight.
On the first day of December, sunrise is at 6:42 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:55 pm PST.

Sunshine

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

UV index

The month with the lowest UV index in Chatsworth is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In December, a daily maximum UV index of 3 leads to the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What are the coldest months in Chatsworth?

December brings the lowest temperatures in Chatsworth, with an average high of 61.7°F (16.5°C) and an average low of 46.2°F (7.9°C).

What is the temperature in December in Chatsworth?

December temperatures in Chatsworth vary between a high-temperature of 61.7°F (16.5°C) and a low-temperature of 46.2°F (7.9°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is evaluated at 84.2°F (29°C).

What is the average humidity in December in Chatsworth?

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

How many days does it rain in December in Chatsworth?

In Chatsworth, California, during December, the rain falls for 5 days and regularly aggregates up to 1.42" (36mm) of precipitation.

What is the month with the shortest days in Chatsworth?

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

How many hours of daylight does Chatsworth have in December?

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

When are sunrise and sunset in December in Chatsworth?

On the first day of December in Chatsworth, sunrise is at 6:42 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:55 pm PST.

What is the month with the least sunshine in Chatsworth?

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

How long on average sun shines in December in Chatsworth?

The average sunshine duration in December in Chatsworth, California, is 6.8h.

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

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

What is the UV index intensity in December in Chatsworth?

In Chatsworth, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
Chatsworth, CA

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

The warmest month (with the highest average high temperature) is August (85.8°F).
The month with the lowest average high temperature is December (61.7°F).

  • Average low temperature in December: 46.2°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).

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Average pressure in December
Chatsworth, CA

Average pressure in December - Chatsworth, CA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in December
Chatsworth, CA

Average wind speed in December - Chatsworth, CA
  • Average wind speed in December: 6.2mph

The windiest months (with the highest average wind speed) are January and December (6.2mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity in December
Chatsworth, CA

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

The month with the highest relative humidity is June (58%).
The month with the lowest relative humidity is November (47%).

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Average rainfall in December
Chatsworth, CA

Average rainfall in December - Chatsworth, CA
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is February (1.54").
The driest month (with the least rainfall) is June (0").

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Average rainfall days in December
Chatsworth, CA

Average rainfall days in December - Chatsworth, CA
  • Average rainfall days in December: 5 days

The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.8 days).

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

Average daylight in December / Average sunshine in December - Chatsworth, 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 June and July (Average sunshine: 12h and 6min).
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
Chatsworth, CA

Average sunshine days in December - Chatsworth, CA
  • Average sunshine days in December: 25.2 days

The month with the most sunshine days is May (28.8 days).
The month with the least sunshine days is February (22.9 days).

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Average UV index in December
Chatsworth, CA

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

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Chatsworth, CA

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

The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in December
Chatsworth, CA

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

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