December weather forecast
Lake Arrowhead, CA

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Weather in December

December, the first month of the winter in Lake Arrowhead, is still a cool month, with an average temperature varying between 53.4°F (11.9°C) and 38.3°F (3.5°C).

Temperature

With an average high-temperature of 53.4°F (11.9°C) and an average low-temperature of 38.3°F (3.5°C), December is the coldest month.

Humidity

February and December, with an average relative humidity of 52%, are the most humid months in Lake Arrowhead.

Rainfall

In Lake Arrowhead, in December, during 5.5 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Lake Arrowhead, California, during the entire year, the rain falls for 42.2 days and collects up to 5.55" (141mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Lake Arrowhead, California, during December, snow falls for 2.5 days and regularly aggregates up to 2.09" (53mm) of snow. Throughout the year, in Lake Arrowhead, there are 15.6 snowfall days, and 18.35" (466mm) of snow is accumulated.

Daylight

With an average of 9h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:37 am and sunset at 4:38 pm. On the last day of December, in Lake Arrowhead, sunrise is at 6:54 am and sunset at 4:49 pm PST.

Sunshine

December has the least sunshine of the year in Lake Arrowhead, with an average of 6.9h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Lake Arrowhead, California. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, a daily UV index of 3 turns into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Updated: Feb 9, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are the coldest months in Lake Arrowhead?

In Lake Arrowhead, December is the month with the lowest recorded average temperatures, measuring a high of 53.4°F (11.9°C) and a low of 38.3°F (3.5°C).

What is the usual temperature for Lake Arrowhead in December?

The high-temperature, in December, in Lake Arrowhead, is 53.4°F (11.9°C), while the low-temperature averages to 38.3°F (3.5°C).

What is the most humid month in Lake Arrowhead?

February and December, with an average relative humidity of 52%, are most humid months in Lake Arrowhead, California.

What is the average humidity in December in Lake Arrowhead?

In Lake Arrowhead, the average relative humidity in December is 52%.

How much does it rain in Lake Arrowhead in December?

In Lake Arrowhead, California, in December, it is raining for 5.5 days, with typically 0.98" (25mm) of accumulated precipitation.

How many days does it snow in December in Lake Arrowhead?

In Lake Arrowhead, California, during December, snow falls for 2.5 days and regularly aggregates up to 2.09" (53mm) of snow.

What is the month with the shortest days in Lake Arrowhead?

With an average of 9h and 54min of daylight, December has the shortest days of the year in Lake Arrowhead.

What is the average length of the day in December in Lake Arrowhead?

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

When is the sunrise / sunset in December in Lake Arrowhead?

In December, on the first day of the month, sunrise is at 6:37 am and sunset at 4:38 pm. On the last day of the month, in Lake Arrowhead, sunrise is at 6:54 am and sunset at 4:49 pm PST.

What is the month with the least sunshine in Lake Arrowhead?

The month with the least sunshine in Lake Arrowhead, California, is December, with an average of 6.9h of sunshine.

How long on average sun shines in December in Lake Arrowhead?

In Lake Arrowhead, the average sunshine duration in December is 6.9h.

When is the lowest UV index in Lake Arrowhead?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

What is the UV index intensity in December in Lake Arrowhead?

The average daily maximum UV index in December in Lake Arrowhead, California, is 3. A UV Index estimate of 3 to 5 represents a medium health risk 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
Lake Arrowhead, CA

Average temperature in December - Lake Arrowhead, CA
  • Average high temperature in December: 53.4°F

The warmest months (with the highest average high temperature) are July and August (88.3°F).
The month with the lowest average high temperature is December (53.4°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).

Average pressure in December
Lake Arrowhead, CA

Average pressure in December - Lake Arrowhead, CA
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in December
Lake Arrowhead, CA

Average wind speed in December - Lake Arrowhead, CA
  • Average wind speed in December: 5.9mph

The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is September (5.3mph).

Average humidity in December
Lake Arrowhead, CA

Average humidity in December - Lake Arrowhead, CA
  • Average humidity in December: 52%

The months with the highest relative humidity are February and December (52%).
The month with the lowest relative humidity is August (32%).

Average rainfall in December
Lake Arrowhead, CA

Average rainfall in December - Lake Arrowhead, CA
  • Average rainfall in December: 0.98"

The wettest month (with the highest rainfall) is February (1.1").
The driest month (with the least rainfall) is June (0.08").

Average rainfall days in December
Lake Arrowhead, CA

Average rainfall days in December - Lake Arrowhead, CA
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is March (5.7 days).
The month with the least rainy days is June (1.2 days).

Average snowfall in December
Lake Arrowhead, CA

Average snowfall in December - Lake Arrowhead, CA
  • Average snowfall in December: 2.09"

The month with the highest snowfall is April (4.09").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Lake Arrowhead, CA

Average snowfall days in December - Lake Arrowhead, CA
  • Average snowfall days in December: 2.5 days

The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Lake Arrowhead, CA

Average daylight in December / Average sunshine in December - Lake Arrowhead, 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 month with the least sunshine is December (Average sunshine: 6h and 54min).

Average sunshine days in December
Lake Arrowhead, CA

Average sunshine days in December - Lake Arrowhead, CA
  • Average sunshine days in December: 23.6 days

The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.8 days).

Average UV index in December
Lake Arrowhead, CA

Average UV index in December - Lake Arrowhead, CA
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in December
Lake Arrowhead, CA

Average cloud cover in December - Lake Arrowhead, CA
  • Average cloud cover in December: 22

The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

Average visibility in December
Lake Arrowhead, CA

Average visibility in December - Lake Arrowhead, 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).

Lake Arrowhead, California, USA

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