December weather forecast
Mountain View Acres, CA

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Weather in December

The first month of the winter, December, is still a cool month in Mountain View Acres, California, with an average temperature fluctuating between 38.5°F (3.6°C) and 54.1°F (12.3°C).

Temperature

The coldest temperatures occur during December, when averages reach a peak of 54.1°F (12.3°C) and a low of 38.5°F (3.6°C).

Humidity

With an average relative humidity of 52%, December is the most humid month.

Rainfall

December is the month with the most rainfall in Mountain View Acres, California. Rain falls for 6.2 days and accumulates 1.18" (30mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Mountain View Acres, during December, snow falls for 0.5 days and regularly aggregates up to 1.38" (35mm) of snow. In Mountain View Acres, during the entire year, snow falls for 3.1 days and aggregates up to 5.28" (134mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 6:38 am and sunset at 4:39 pm. On the last day of December, sunrise is at 6:55 am and sunset at 4:49 pm PST.

Sunshine

December has the least sunshine of the year in Mountain View Acres, with an average of 7h 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 Mountain View Acres. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 3 during December translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What time of the year is the coldest in Mountain View Acres?

With average temperatures fluctuating between a high of 54.1°F (12.3°C) and a low of 38.5°F (3.6°C), December stands out as the coldest month.

What is the temperature in December in Mountain View Acres?

During December, Mountain View Acres experiences an average high-temperature of 54.1°F (12.3°C) and a low-temperature of 38.5°F (3.6°C).

What is the most humid month in Mountain View Acres?

With an average relative humidity of 52%, December is the most humid month.

What is the average humidity in December in Mountain View Acres?

In December, the average relative humidity in Mountain View Acres, California, is 52%.

What is the rainiest month in Mountain View Acres?

December is the month with the most rainfall in Mountain View Acres, California. Rain falls for 6.2 days and accumulates 1.18" (30mm) of precipitation.

How many days does it rain in December in Mountain View Acres?

In Mountain View Acres, California, in December, during 6.2 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

How many days does it snow in December in Mountain View Acres?

In Mountain View Acres, California, during December, snow falls for 0.5 days and regularly aggregates up to 1.38" (35mm) of snow.

What is the month with the shortest days in Mountain View Acres?

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

How many hours of daylight does Mountain View Acres have in December?

In December, the average day length in Mountain View Acres, California, is 9h and 53min.

When are sunrise and sunset in December in Mountain View Acres?

On the first day of December in Mountain View Acres, California, sunrise is at 6:38 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 4:49 pm PST.

What is the month with the least sunshine in Mountain View Acres?

December has the least sunshine of the year, with an average of 7h of sunshine.

How long on average sun shines in December in Mountain View Acres?

In December, the average sunshine duration in Mountain View Acres, California, is 7h.

When is the lowest UV index in Mountain View Acres?

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

What is the UV index intensity in December in Mountain View Acres?

In Mountain View Acres, California, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
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
Mountain View Acres, CA

Average temperature in December - Mountain View Acres, CA
  • Average high temperature in December: 54.1°F

The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is December (54.1°F).

  • Average low temperature in December: 38.5°F

The month with the highest average low temperature is August (67.5°F).
The coldest month (with the lowest average low temperature) is December (38.5°F).

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Average pressure in December
Mountain View Acres, CA

Average pressure in December - Mountain View Acres, CA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in December
Mountain View Acres, CA

Average wind speed in December - Mountain View Acres, CA
  • Average wind speed in December: 6.3mph

The windiest months (with the highest average wind speed) are April and May (9.1mph).
The calmest month (with the lowest average wind speed) is January (6.2mph).

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Average humidity in December
Mountain View Acres, CA

Average humidity in December - Mountain View Acres, CA
  • Average humidity in December: 52%

The month with the highest relative humidity is December (52%).
The month with the lowest relative humidity is August (30%).

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Average rainfall in December
Mountain View Acres, CA

Average rainfall in December - Mountain View Acres, CA
  • Average rainfall in December: 1.18"

The wettest month (with the highest rainfall) is December (1.18").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in December
Mountain View Acres, CA

Average rainfall days in December - Mountain View Acres, CA
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (0.8 days).

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Average snowfall in December
Mountain View Acres, CA

Average snowfall in December - Mountain View Acres, CA
  • Average snowfall in December: 1.38"

The month with the highest snowfall is November (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Mountain View Acres, CA

Average snowfall days in December - Mountain View Acres, CA
  • Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Mountain View Acres, CA

Average daylight in December / Average sunshine in December - Mountain View Acres, 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: 7h and 0min

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: 7h and 0min).

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Average sunshine days in December
Mountain View Acres, CA

Average sunshine days in December - Mountain View Acres, CA
  • Average sunshine days in December: 23.3 days

The month with the most sunshine days is June (28.8 days).
The month with the least sunshine days is February (21.6 days).

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Average UV index in December
Mountain View Acres, CA

Average UV index in December - Mountain View Acres, CA
  • Average UV index in December: 3

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

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Average cloud cover in December
Mountain View Acres, CA

Average cloud cover in December - Mountain View Acres, CA
  • Average cloud cover in December: 21

The month with the most cloud cover is December (Cloud cover 21).
The months with the least cloud cover are June, August and September (Cloud cover 6).

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Average visibility in December
Mountain View Acres, CA

Average visibility in December - Mountain View Acres, 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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Mountain View Acres, California, USA

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