December weather forecast
Trabuco Canyon, CA

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Weather in December

The first month of the winter, December, is still a refreshing month in Trabuco Canyon, California, with an average temperature ranging between max 63.1°F (17.3°C) and min 49.5°F (9.7°C).

Temperature

December stands out as Trabuco Canyon's coldest month, with an average high-temperature of 63.1°F (17.3°C) and a low-temperature of 49.5°F (9.7°C).

Humidity

In December, the average relative humidity in Trabuco Canyon is 59%.

Rainfall

The month with the most rainfall is December, when the rain falls for 6.7 days and typically aggregates up to 1.85" (47mm) of precipitation.

Daylight

December has the shortest days of the year in Trabuco Canyon, California, with an average of 10h and 0min of daylight.
On the first day of December, sunrise is at 6:37 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:52 pm PST.

Sunshine

With an average of 6.6h of sunshine, December has the least sunshine of the year.

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Trabuco Canyon. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 4 in December translates into this advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

What time of the year is the coldest in Trabuco Canyon?

Trabuco Canyon's December weather, marked by an average high temperature of 63.1°F (17.3°C) and an average low temperature of 49.5°F (9.7°C), is the coldest in the year.

What is the temperature in December in Trabuco Canyon?

In Trabuco Canyon, 63.1°F (17.3°C) is the average high-temperature and 49.5°F (9.7°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 82.4°F (28°C).

What is the average humidity in December in Trabuco Canyon?

In Trabuco Canyon, California, the average relative humidity in December is 59%.

What is the rainiest month in Trabuco Canyon?

The month with the most rainfall in Trabuco Canyon, California, is December, when the rain falls for 6.7 days and typically aggregates up to 1.85" (47mm) of precipitation.

How much does it rain in Trabuco Canyon in December?

In Trabuco Canyon, California, during December, the rain falls for 6.7 days and regularly aggregates up to 1.85" (47mm) of precipitation.

What is the month with the shortest days in Trabuco Canyon?

December has the shortest days of the year, with an average of 10h and 0min of daylight.

What is the average length of the day in December in Trabuco Canyon?

In December, the average day length is 9h and 58min.

When is the sunrise / sunset in December in Trabuco Canyon?

On the first day of December in Trabuco Canyon, sunrise is at 6:37 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:52 pm PST.

What is the month with the least sunshine in Trabuco Canyon?

With an average of 6.6h of sunshine, December has the least sunshine of the year in Trabuco Canyon, California.

How many hours of sunshine does Trabuco Canyon have in December?

In Trabuco Canyon, the average sunshine duration in December is 6.6h.

What are the months with the lowest UV index in Trabuco Canyon?

The months with the lowest UV index in Trabuco Canyon are January through March, November and December, with an average maximum UV index of 4.

How high is the UV index in December in Trabuco Canyon?

In December, the average daily maximum UV index in Trabuco Canyon is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's 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
Trabuco Canyon, CA

Average temperature in December - Trabuco Canyon, CA
  • Average high temperature in December: 63.1°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).

  • Average low temperature in December: 49.5°F

The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in December
Trabuco Canyon, CA

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

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

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Average wind speed in December
Trabuco Canyon, CA

Average wind speed in December - Trabuco Canyon, CA
  • Average wind speed in December: 5mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).

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Average humidity in December
Trabuco Canyon, CA

Average humidity in December - Trabuco Canyon, CA
  • Average humidity in December: 59%

The months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).

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Average rainfall in December
Trabuco Canyon, CA

Average rainfall in December - Trabuco Canyon, CA
  • Average rainfall in December: 1.85"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in December
Trabuco Canyon, CA

Average rainfall days in December - Trabuco Canyon, CA
  • Average rainfall days in December: 6.7 days

The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).

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Average daylight in December /
Average sunshine in December
Trabuco Canyon, CA

Average daylight in December / Average sunshine in December - Trabuco Canyon, CA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

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Average sunshine days in December
Trabuco Canyon, CA

Average sunshine days in December - Trabuco Canyon, CA
  • Average sunshine days in December: 22.5 days

The months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).

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Average UV index in December
Trabuco Canyon, CA

Average UV index in December - Trabuco Canyon, CA
  • Average UV index in December: 4

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average cloud cover in December
Trabuco Canyon, CA

Average cloud cover in December - Trabuco Canyon, CA
  • Average cloud cover in December: 24

The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in December
Trabuco Canyon, CA

Average visibility in December - Trabuco Canyon, 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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Trabuco Canyon, California, USA

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