December weather forecast and climate
Lancaster, CA

Weather in December

December, the first month of the winter, in Lancaster, is still a cool month, with average temperature fluctuating between 37.8°F (3.2°C) and 54.5°F (12.5°C).

Temperature

The coldest month is December, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 37.8°F (3.2°C).

Humidity

December is the most humid month, with an average relative humidity of 54%.

Rainfall

December is the month with the most rainfall. Rain falls for 5.8 days and accumulates 1.34" (34mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. The month with the most snowfall in Lancaster is December when snow falls for 0.3 days and typically aggregates up to 2.01" (51mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9.9h of daylight.

Sunshine

In Lancaster, the average sunshine in December is 7h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Lancaster?

December is the coldest month in Lancaster, with an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 37.8°F (3.2°C).

What is the temperature in December in Lancaster?

In Lancaster, in December, the average high-temperature is 54.5°F (12.5°C), and the average low-temperature is 37.8°F (3.2°C).

What is the most humid month in Lancaster?

December is the most humid month, with an average relative humidity of 54%.

What is the average humidity in December in Lancaster?

In Lancaster, California, the average relative humidity in December is 54%.

How many days does it rain in December in Lancaster?

In Lancaster, in December, during 5.8 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

What is the wettest month in Lancaster?

The month with the most rainfall is December when the rain falls for 5.8 days and typically aggregates up to 1.34" (34mm) of precipitation.

How much does it snow in Lancaster in December?

In Lancaster, California, in December, during 0.3 snowfall days, 2.01" (51mm) of snow is typically accumulated.

When does it snow the most in Lancaster?

December is the month with the most snowfall in Lancaster. Snow falls for 0.3 days and accumulates 2.01" (51mm) of snow.

What is the month with the shortest days in Lancaster?

December has the shortest days of the year, with an average of 9.9h of daylight.

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

In Lancaster, the average length of the day in December is 9.9h.

How long on average sun shines in December in Lancaster?

The average sunshine in December in Lancaster is 7h.

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

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

How high is the UV index in December in Lancaster?

In Lancaster, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in December
Lancaster, CA

Average temperature in December - Lancaster, CA
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 37.8°F

The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is December (37.8°F).

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Average pressure in December
Lancaster, CA

Average pressure in December - Lancaster, CA
  • Average pressure in December: 30.09"

The month with the highest atmospheric pressure is January (30.12").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in December
Lancaster, CA

Average wind speed in December - Lancaster, CA
  • Average wind speed in December: 6.8mph

The windiest month (with the highest average wind speed) is May (9.3mph).
The calmest month (with the lowest average wind speed) is January (6.7mph).

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Average humidity in December
Lancaster, CA

Average humidity in December - Lancaster, CA
  • Average humidity in December: 54%

The month with the highest relative humidity is December (54%).
The month with the lowest relative humidity is August (31%).

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Average rainfall in December
Lancaster, CA

Average rainfall in December - Lancaster, CA
  • Average rainfall in December: 1.34"

The wettest month (with the highest rainfall) is December (1.34").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Lancaster, CA

Average rainfall days in December - Lancaster, CA
  • Average rainfall days in December: 5.8 days

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.1 days).

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Average snowfall in December
Lancaster, CA

Average snowfall in December - Lancaster, CA
  • Average snowfall in December: 2.01"

The month with the highest snowfall is December (2.01").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Lancaster, CA

Average snowfall days in December - Lancaster, CA
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is February (0.8 days).
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
Lancaster, CA

Average daylight in December / Average sunshine in December - Lancaster, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 7h

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is January (Average sunshine: 6.9h).

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Average sunshine days in December
Lancaster, CA

Average sunshine days in December - Lancaster, CA
  • Average sunshine days in December: 23.8 days

The month with the most sunshine days is June (28.1 days).
The month with the least sunshine days is February (20.8 days).

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Average UV index in December
Lancaster, CA

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

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Lancaster, CA

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

Months with the most cloud cover are March and December (Cloud cover 21).
Months with the least cloud cover are June, August and September (Cloud cover 5).

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Average visibility in December
Lancaster, CA

Average visibility in December - Lancaster, 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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