December weather forecast
Valley Center, CA

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Weather in December

December, the first month of the winter in Valley Center, is still a refreshing month, with an average temperature fluctuating between 62.4°F (16.9°C) and 45.1°F (7.3°C).

Temperature

Valley Center's coldest weather arrives in December, when temperatures average a high of 62.4°F (16.9°C) and a low of 45.1°F (7.3°C).

Humidity

In December, the average relative humidity is 58%.

Rainfall

In Valley Center, during December, the rain falls for 5.5 days and regularly aggregates up to 0.79" (20mm) of precipitation. Throughout the year, there are 51.6 rainfall days, and 5.59" (142mm) of precipitation is accumulated.

Snowfall

In Valley Center, snow does not fall in January, March through December.

Daylight

The month with the shortest days in Valley Center is December, with an average of 10h and 0min of daylight.
On the first day of December, sunrise is at 6:34 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:51 pm PST.

Sunshine

With an average of 6.7h of sunshine, December has the least sunshine of the year in Valley Center.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a daily UV index of 3 turns into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What is the coldest time of year in Valley Center?

December, marked by an average high-temperature of 62.4°F (16.9°C) and a low-temperature of 45.1°F (7.3°C), is the coldest month.

What are the temperatures in Valley Center in December?

The high-temperature, in December, in Valley Center, is 62.4°F (16.9°C), while the low-temperature averages to 45.1°F (7.3°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is appraised at 87.8°F (31°C).

What is the average humidity in December in Valley Center?

In Valley Center, the average relative humidity in December is 58%.

How much does it rain in Valley Center in December?

In Valley Center, California, in December, during 5.5 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.

When it does not snow in Valley Center?

January, March through December are months without snowfall in Valley Center.

What is the month with the shortest days in Valley Center?

The month with the shortest days in Valley Center is December, with an average of 10h and 0min of daylight.

How many hours of daylight does Valley Center have in December?

In December, the average day length is 10h and 0min.

When is the sunrise / sunset in December in Valley Center?

In December, on the first day of the month, sunrise is at 6:34 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:51 pm PST.

What is the month with the least sunshine in Valley Center?

The month with the least sunshine in Valley Center, California, is December, with an average of 6.7h of sunshine.

How many hours of sunshine does Valley Center have in December?

The average sunshine duration in December in Valley Center is 6.7h.

What is the month with the lowest UV index in Valley Center?

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

What is the UV index intensity in December in Valley Center?

In December, the average daily maximum UV index in Valley Center is 3. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
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
Valley Center, CA

Average temperature in December - Valley Center, CA
  • Average high temperature in December: 62.4°F

The warmest month (with the highest average high temperature) is August (86.9°F).
The month with the lowest average high temperature is December (62.4°F).

  • Average low temperature in December: 45.1°F

The month with the highest average low temperature is August (63.1°F).
The coldest month (with the lowest average low temperature) is February (44.6°F).

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Average pressure in December
Valley Center, CA

Average pressure in December - Valley Center, CA
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in December
Valley Center, CA

Average wind speed in December - Valley Center, CA
  • Average wind speed in December: 5mph

The windiest month (with the highest average wind speed) is April (5.3mph).
The calmest month (with the lowest average wind speed) is September (4.2mph).

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Average humidity in December
Valley Center, CA

Average humidity in December - Valley Center, CA
  • Average humidity in December: 58%

The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (52%).

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Average rainfall in December
Valley Center, CA

Average rainfall in December - Valley Center, CA
  • Average rainfall in December: 0.79"

The wettest month (with the highest rainfall) is February (0.94").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Valley Center, CA

Average rainfall days in December - Valley Center, CA
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall days in December
Valley Center, CA

Average snowfall days in December - Valley Center, 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
Valley Center, CA

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

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in December
Valley Center, CA

Average sunshine days in December - Valley Center, CA
  • Average sunshine days in December: 24.5 days

The month with the most sunshine days is June (28.1 days).
The month with the least sunshine days is February (21.5 days).

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Average UV index in December
Valley Center, CA

Average UV index in December - Valley Center, 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
Valley Center, CA

Average cloud cover in December - Valley Center, CA
  • Average cloud cover in December: 23

The month with the most cloud cover is March (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in December
Valley Center, CA

Average visibility in December - Valley Center, 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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Valley Center, California, USA

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