December weather forecast
Highlands, CA

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Weather in December

The first month of the winter, December, is still a mild month in Highlands, California, with temperature in the range of an average low of 47.5°F (8.6°C) and an average high of 55.8°F (13.2°C).

Temperature

The coldest period is December, when temperatures fluctuate between an average high of 55.8°F (13.2°C) and a low of 47.5°F (8.6°C).

Humidity

The average relative humidity in December is 72%.

Rainfall

In December, in Highlands, California, the rain falls for 5.5 days. Throughout December, 0.35" (9mm) of precipitation is accumulated. Throughout the year, in Highlands, California, there are 32.6 rainfall days, and 2.13" (54mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year in Highlands, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:06 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:01 pm PST.

Sunshine

With an average of 5.9h of sunshine, December has the least sunshine of the year.

UV index

February and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 3 in December converts into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. When the Sun is at its strongest around midday, find shade and limit exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Frequently asked questions

What are the coldest months in Highlands?

December, characterized by an average high temperature of 55.8°F (13.2°C) and a low temperature of 47.5°F (8.6°C), is generally the coldest month in Highlands, California.

What is the average December temperature in Highlands?

During December, Highlands experiences an average high-temperature of 55.8°F (13.2°C) and a low-temperature of 47.5°F (8.6°C).

What is the average humidity in December in Highlands?

The average relative humidity in December is 72%.

How much does it rain in Highlands in December?

In Highlands, California, in December, it is raining for 5.5 days, with typically 0.35" (9mm) of accumulated precipitation.

What is the month with the shortest days in Highlands?

The month with the shortest days in Highlands, California, is December, with an average of 9h and 36min of daylight.

What is the average length of the day in December in Highlands?

In Highlands, the average day length in December is 9h and 37min.

When are sunrise and sunset in December in Highlands?

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 4:51 pm. On the last day of the month, in Highlands, sunrise is at 7:23 am and sunset at 5:01 pm PST.

What is the month with the least sunshine in Highlands?

The month with the least sunshine is December, with an average of 5.9h of sunshine.

How long on average sun shines in December in Highlands?

In December, the average sunshine duration is 5.9h.

What are the months with the lowest UV index in Highlands?

February and December, with an average maximum UV index of 3, are months with the lowest UV index in Highlands, California.

What is the UV index intensity in December in Highlands?

In December, the average daily maximum UV index is 3. 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
Highlands, CA

Average temperature in December - Highlands, CA
  • Average high temperature in December: 55.8°F

The warmest months (with the highest average high temperature) are August and September (71.2°F).
The month with the lowest average high temperature is December (55.8°F).

  • Average low temperature in December: 47.5°F

The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).

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Average pressure in December
Highlands, CA

Average pressure in December - Highlands, CA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

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Average wind speed in December
Highlands, CA

Average wind speed in December - Highlands, CA
  • Average wind speed in December: 6.9mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.9mph).

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Average humidity in December
Highlands, CA

Average humidity in December - Highlands, CA
  • Average humidity in December: 72%

The months with the highest relative humidity are March and August (76%).
The months with the lowest relative humidity are October and November (70%).

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Average rainfall in December
Highlands, CA

Average rainfall in December - Highlands, CA
  • Average rainfall in December: 0.35"

The wettest month (with the highest rainfall) is February (0.55").
The driest months (with the least rainfall) are June, July and August (0").

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Average rainfall days in December
Highlands, CA

Average rainfall days in December - Highlands, CA
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is July (0.3 days).

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Average daylight in December /
Average sunshine in December
Highlands, CA

Average daylight in December / Average sunshine in December - Highlands, CA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in December
Highlands, CA

Average sunshine days in December - Highlands, CA
  • Average sunshine days in December: 24.4 days

The month with the most sunshine days is July (30.4 days).
The month with the least sunshine days is February (23.3 days).

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Average UV index in December
Highlands, CA

Average UV index in December - Highlands, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and December (UV index 3).

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Average cloud cover in December
Highlands, CA

Average cloud cover in December - Highlands, CA
  • Average cloud cover in December: 34

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in December
Highlands, CA

Average visibility in December - Highlands, 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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Highlands, California, USA

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