December weather forecast
Trinity Center, CA

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Weather in December

December, the first month of the winter in Trinity Center, is also a frosty month, with temperature in the range of an average high of 48°F (8.9°C) and an average low of 34°F (1.1°C).

Temperature

In Trinity Center, the lowest average temperatures are observed in December, with a high of 48°F (8.9°C) and a low of 34°F (1.1°C).

Humidity

The average relative humidity in December in Trinity Center, California, is 74%.

Rainfall

In Trinity Center, in December, it is raining for 13.2 days, with typically 3.74" (95mm) of accumulated precipitation. In Trinity Center, during the entire year, the rain falls for 103.6 days and collects up to 25.28" (642mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Trinity Center, California, in December, during 1.1 snowfall days, 1.1" (28mm) of snow is typically accumulated. In Trinity Center, during the entire year, snow falls for 4.7 days and aggregates up to 4.45" (113mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:17 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:52 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 5.4h of sunshine.

UV index

The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 2 in December suggests the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
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Frequently asked questions

What part of the year is the coldest in Trinity Center?

December, with average temperatures reaching a high of 48°F (8.9°C) and a low of 34°F (1.1°C), is the coldest month.

What are the temperatures in Trinity Center in December?

December temperatures vary between a high-temperature of 48°F (8.9°C) and a low-temperature of 34°F (1.1°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is evaluated at 82.4°F (28°C).

What is the average humidity in December in Trinity Center?

The average relative humidity in December in Trinity Center, California, is 74%.

How many days does it rain in December in Trinity Center?

In Trinity Center, in December, during 13.2 rainfall days, 3.74" (95mm) of precipitation is typically accumulated.

How much does it snow in Trinity Center in December?

In December, in Trinity Center, California, it is snowing for 1.1 days. Throughout December, 1.1" (28mm) of snow is accumulated.

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

December has the shortest days of the year in Trinity Center, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Trinity Center?

In Trinity Center, California, the average day length in December is 9h and 17min.

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

On the first day of December in Trinity Center, California, sunrise is at 7:17 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:52 pm PST.

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

The month with the least sunshine in Trinity Center, California, is December, with an average of 5.4h of sunshine.

How long on average sun shines in December in Trinity Center?

In December, the average sunshine duration in Trinity Center, California, is 5.4h.

When is the lowest UV index in Trinity Center?

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Trinity Center, California.

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

In Trinity Center, California, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat from unsafe 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
Trinity Center, CA

Average temperature in December - Trinity Center, CA
  • Average high temperature in December: 48°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (48°F).

  • Average low temperature in December: 34°F

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (34°F).

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Average pressure in December
Trinity Center, CA

Average pressure in December - Trinity Center, CA
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).

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Average wind speed in December
Trinity Center, CA

Average wind speed in December - Trinity Center, CA
  • Average wind speed in December: 4.7mph

The windiest months (with the highest average wind speed) are March and October (5.3mph).
The calmest months (with the lowest average wind speed) are August and November (4.5mph).

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Average humidity in December
Trinity Center, CA

Average humidity in December - Trinity Center, CA
  • Average humidity in December: 74%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is August (37%).

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Average rainfall in December
Trinity Center, CA

Average rainfall in December - Trinity Center, CA
  • Average rainfall in December: 3.74"

The wettest month (with the highest rainfall) is March (4.8").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in December
Trinity Center, CA

Average rainfall days in December - Trinity Center, CA
  • Average rainfall days in December: 13.2 days

The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is August (1.7 days).

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Average snowfall in December
Trinity Center, CA

Average snowfall in December - Trinity Center, CA
  • Average snowfall in December: 1.1"

The month with the highest snowfall is November (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Trinity Center, CA

Average snowfall days in December - Trinity Center, CA
  • Average snowfall days in December: 1.1 days

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Trinity Center, CA

Average daylight in December / Average sunshine in December - Trinity Center, CA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days in December
Trinity Center, CA

Average sunshine days in December - Trinity Center, CA
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (12.1 days).

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Average UV index in December
Trinity Center, CA

Average UV index in December - Trinity Center, CA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 2).

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Average cloud cover in December
Trinity Center, CA

Average cloud cover in December - Trinity Center, CA
  • Average cloud cover in December: 41

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Trinity Center, CA

Average visibility in December - Trinity Center, CA
  • Average visibility in December: 5mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).

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Trinity Center, California, USA

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