December weather forecast and climate
Chatsworth, CA

Weather in December

The first month of the winter, December, is still a comfortable month in Chatsworth, California, with average temperature ranging between min 46.2°F (7.9°C) and max 61.7°F (16.5°C).

Temperature

With an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 46.2°F (7.9°C), December is the coldest month.

Humidity

In December, the average relative humidity is 52%.

Rainfall

In Chatsworth, it is raining for 5 days, with typically 1.42" (36mm) of accumulated precipitation. In Chatsworth, during the entire year, the rain falls for 39.8 days and collects up to 7.52" (191mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 9.9h of daylight.

Sunshine

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

UV index

December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the coldest month in Chatsworth?

December is the coldest month in Chatsworth, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 46.2°F (7.9°C).

What is the temperature in December in Chatsworth?

In December, in Chatsworth, the average high-temperature is 61.7°F (16.5°C), and the average low-temperature is 46.2°F (7.9°C).

What is the average humidity in December in Chatsworth?

The average relative humidity in December in Chatsworth is 52%.

How many days does it rain in December in Chatsworth?

In Chatsworth, 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?

December has the shortest days of the year, with an average of 9.9h of daylight.

What is the average length of the day in December in Chatsworth?

The average length of the day in December in Chatsworth is 9.9h.

What is the month with the least sunshine in Chatsworth?

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

How many hours of sunshine does Chatsworth have in December?

In Chatsworth, the average sunshine in December is 6.8h.

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

The month with the lowest UV index is December, with an average maximum UV index of 3.

What is the UV index reading in December in Chatsworth?

In Chatsworth, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.

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"

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

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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: 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 June and July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.8).

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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

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

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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