December weather forecast and climate
Palomar Mountain, CA

Weather in December

December, the first month of the winter, in Palomar Mountain, is also an enjoyable month, with average temperature varying between 62.4°F (16.9°C) and 45.1°F (7.3°C).

Temperature

The coldest month is December, with an average high-temperature of 62.4°F (16.9°C) and an average low-temperature of 45.1°F (7.3°C).

Humidity

In December, the average relative humidity in Palomar Mountain, California, is 58%.

Rainfall

In December, in Palomar Mountain, the rain falls for 5.5 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. Throughout the year, in Palomar Mountain, there are 51.6 rainfall days, and 5.59" (142mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. Throughout December, in Palomar Mountain, 5.4" (137.2mm) of snow is accumulated. Throughout the year, 35.5" (901.8mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Palomar Mountain, with an average of 10h of daylight.

Sunshine

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

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Palomar Mountain?

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

What is the temperature in December in Palomar Mountain?

In Palomar Mountain, California, in December, the average high-temperature is 62.4°F (16.9°C), and the average low-temperature is 45.1°F (7.3°C).

What is the average humidity in December in Palomar Mountain?

In Palomar Mountain, the average relative humidity in December is 58%.

How many days does it rain in December in Palomar Mountain?

In Palomar Mountain, California, in December, it is raining for 5.5 days, with typically 0.79" (20mm) of accumulated precipitation.

How much does it snow in Palomar Mountain in December?

In Palomar Mountain, California, in December, 5.4" (137.2mm) of snow is typically accumulated.

What is the month with the shortest days in Palomar Mountain?

With an average of 10h of daylight, December has the shortest days of the year in Palomar Mountain, California.

How many hours of daylight does Palomar Mountain have in December?

In December, the average length of the day is 10h.

What is the month with the least sunshine in Palomar Mountain?

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

How long on average sun shines in December in Palomar Mountain?

In December, the average sunshine in Palomar Mountain, California, is 6.7h.

What is the month with the lowest UV index in Palomar Mountain?

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

How high is the UV index in December in Palomar Mountain?

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

Average temperature in December
Palomar Mountain, CA

Average temperature in December - Palomar Mountain, 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
Palomar Mountain, CA

Average pressure in December - Palomar Mountain, CA
  • Average pressure in December: 30.06"

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

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Average wind speed in December
Palomar Mountain, CA

Average wind speed in December - Palomar Mountain, 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
Palomar Mountain, CA

Average humidity in December - Palomar Mountain, 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
Palomar Mountain, CA

Average rainfall in December - Palomar Mountain, 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
Palomar Mountain, CA

Average rainfall days in December - Palomar Mountain, 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 in December
Palomar Mountain, CA

Average snowfall in December - Palomar Mountain, CA
  • Average snowfall in December: 5.4"

The month with the highest snowfall is March (9.4").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Palomar Mountain, CA

Average snowfall days in December - Palomar Mountain, CA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.1 days).
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
Palomar Mountain, CA

Average daylight in December / Average sunshine in December - Palomar Mountain, CA
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 6.7h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in December
Palomar Mountain, CA

Average sunshine days in December - Palomar Mountain, 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
Palomar Mountain, CA

Average UV index in December - Palomar Mountain, 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
Palomar Mountain, CA

Average cloud cover in December - Palomar Mountain, 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
Palomar Mountain, CA

Average visibility in December - Palomar Mountain, 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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