December weather forecast
Highland, CA

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Weather in December

The first month of the winter, December, is also a moderate month in Highland, California, with an average temperature varying between 41.5°F and 57.7°F.

Temperature

December, with its average high-temperature of 57.7°F and an average low-temperature of 41.5°F, holds the record as the coldest month.

Humidity

In Highland, the average relative humidity in December is 51%.

Rainfall

The month with the most rainfall is December, when the rain falls for 6.8 days and typically aggregates up to 1.42" of precipitation.

Snowfall

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

Daylight

December has the shortest days of the year in Highland, with an average of 9h and 54min of daylight.
On the first day of December in Highland, sunrise is at 6:36 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:49 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 6.9h of sunshine.

UV index

November and December, with an average maximum UV index of 3, are months with the lowest UV index in Highland. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 3 during December translates into the following guidance:
Put precautions into practice - Guidance to elude sunburn is provided. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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FAQ

What time of the year is the coldest in Highland?

Highland's coldest month, December, generally records average temperatures ranging from a high of 57.7°F to a low of 41.5°F.

What is the temperature in December in Highland?

In December, the average high-temperature and low-temperature in Highland, California, are 57.7°F and 41.5°F respectively. In June, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 84.2°F.

What is the average humidity in December in Highland?

In Highland, the average relative humidity in December is 51%.

What is the wettest month in Highland?

December is the month with the most rainfall in Highland, California. Rain falls for 6.8 days and accumulates 1.42" of precipitation.

How much does it rain in Highland in December?

In Highland, in December, during 6.8 rainfall days, 1.42" of precipitation is typically accumulated.

When it does not snow in Highland?

January, March through December are months without snowfall.

What is the month with the shortest days in Highland?

The month with the shortest days in Highland is December, with an average of 9h and 54min of daylight.

How many hours of daylight does Highland have in December?

In Highland, California, the average day length in December is 9h and 55min.

What time are sunrise and sunset in December in Highland?

In December, on the first day of the month, sunrise is at 6:36 am and sunset at 4:39 pm. On the last day of the month, in Highland, California, sunrise is at 6:54 am and sunset at 4:49 pm PST.

What is the month with the least sunshine in Highland?

December has the least sunshine of the year in Highland, California, with an average of 6.9h of sunshine.

How long on average sun shines in December in Highland?

The average sunshine duration in December in Highland is 6.9h.

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

The months with the lowest UV index in Highland are November and December, with an average maximum UV index of 3.

How high is the UV index in December in Highland?

In December, the average daily maximum UV index in Highland is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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
Highland, CA

Average temperature in December - Highland, CA
  • Average high temperature in December: 57.7°F

The warmest month (with the highest average high temperature) is August (90.9°F).
The month with the lowest average high temperature is December (57.7°F).

  • Average low temperature in December: 41.5°F

The month with the highest average low temperature is August (66.6°F).
The coldest months (with the lowest average low temperature) are February and December (41.5°F).

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Average pressure in December
Highland, CA

Average pressure in December - Highland, 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 (29.84"Hg).

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Average wind speed in December
Highland, CA

Average wind speed in December - Highland, CA
  • Average wind speed in December: 5.4mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is September (4.8mph).

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Average humidity in December
Highland, CA

Average humidity in December - Highland, CA
  • Average humidity in December: 51%

The month with the highest relative humidity is February (52%).
The month with the lowest relative humidity is August (36%).

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Average rainfall in December
Highland, CA

Average rainfall in December - Highland, CA
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Highland, CA

Average rainfall days in December - Highland, CA
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.3 days).

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Average snowfall days in December
Highland, CA

Average snowfall days in December - Highland, 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
Highland, CA

Average daylight in December / Average sunshine in December - Highland, 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 month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

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Average sunshine days in December
Highland, CA

Average sunshine days in December - Highland, CA
  • Average sunshine days in December: 22.9 days

The month with the most sunshine days is June (28.5 days).
The month with the least sunshine days is February (20.9 days).

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Average UV index in December
Highland, CA

Average UV index in December - Highland, 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 November and December (UV index 3).

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Average cloud cover in December
Highland, CA

Average cloud cover in December - Highland, CA
  • Average cloud cover in December: 21

The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Highland, CA

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

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