December weather forecast and climate
Round Mountain, CA

Weather in December

December, the first month of the winter, in Round Mountain, is still a chilly month, with average temperature varying between 43.3°F (6.3°C) and 27.9°F (-2.3°C).

Temperature

With an average high-temperature of 43.3°F (6.3°C) and an average low-temperature of 27.9°F (-2.3°C), December is the coldest month.

Humidity

In December, the average relative humidity in Round Mountain is 76%.

Rainfall

In Round Mountain, in December, during 12.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated. In Round Mountain, California, during the entire year, the rain falls for 105 days and collects up to 24.69" (627mm) of precipitation.

Snowfall

Months with snowfall in Round Mountain, California, are January through May, October through December. In Round Mountain, during 7.5 snowfall days, 8.11" (206mm) of snow is typically accumulated. Throughout the year, there are 36.7 snowfall days, and 43.62" (1108mm) of snow is accumulated.

Daylight

With an average of 9.3h of daylight, December has the shortest days of the year in Round Mountain, California.

Sunshine

The month with the least sunshine in Round Mountain is December, with an average of 5.7h of sunshine.

UV index

Months with the lowest UV index in Round Mountain are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Round Mountain?

With an average high-temperature of 43.3°F (6.3°C) and an average low-temperature of 27.9°F (-2.3°C), December is the coldest month in Round Mountain.

What is the temperature in December in Round Mountain?

In Round Mountain, in December, the average high-temperature is 43.3°F (6.3°C), and the average low-temperature is 27.9°F (-2.3°C).

What is the average humidity in December in Round Mountain?

In Round Mountain, California, the average relative humidity in December is 76%.

How much does it rain in Round Mountain in December?

In Round Mountain, California, in December, during 12.5 rainfall days, 4.21" (107mm) of precipitation is typically accumulated.

How much does it snow in Round Mountain in December?

In Round Mountain, California, in December, during 7.5 snowfall days, 8.11" (206mm) of snow is typically accumulated.

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

The month with the shortest days in Round Mountain, California, is December, with an average of 9.3h of daylight.

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

In Round Mountain, the average length of the day in December is 9.3h.

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

December has the least sunshine of the year in Round Mountain, California, with an average of 5.7h of sunshine.

How many hours of sunshine does Round Mountain have in December?

The average sunshine in December in Round Mountain, California, is 5.7h.

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

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December in Round Mountain?

In December, the average daily maximum UV index in Round Mountain, California, is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to the UV radiation.

Average temperature in December
Round Mountain, CA

Average temperature in December - Round Mountain, CA
  • Average high temperature in December: 43.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (43.3°F).

  • Average low temperature in December: 27.9°F

The month with the highest average low temperature is July (53.1°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).

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Average pressure in December
Round Mountain, CA

Average pressure in December - Round Mountain, CA
  • Average pressure in December: 30.16"

The month with the highest atmospheric pressure is January (30.18").
Months with the lowest atmospheric pressure are June and August (29.92").

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Average wind speed in December
Round Mountain, CA

Average wind speed in December - Round Mountain, CA
  • Average wind speed in December: 5.1mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in December
Round Mountain, CA

Average humidity in December - Round Mountain, CA
  • Average humidity in December: 76%

Months with the highest relative humidity are January and March (79%).
Months with the lowest relative humidity are July and August (40%).

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Average rainfall in December
Round Mountain, CA

Average rainfall in December - Round Mountain, CA
  • Average rainfall in December: 4.21"

The wettest month (with the highest rainfall) is March (4.45").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in December
Round Mountain, CA

Average rainfall days in December - Round Mountain, CA
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is April (14.5 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in December
Round Mountain, CA

Average snowfall in December - Round Mountain, CA
  • Average snowfall in December: 8.11"

The month with the highest snowfall is March (10.43").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Round Mountain, CA

Average snowfall days in December - Round Mountain, CA
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is March (8 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Round Mountain, CA

Average daylight in December / Average sunshine in December - Round Mountain, CA
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 5.7h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in December
Round Mountain, CA

Average sunshine days in December - Round Mountain, CA
  • Average sunshine days in December: 14.7 days

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.3 days).

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Average UV index in December
Round Mountain, CA

Average UV index in December - Round Mountain, CA
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Round Mountain, CA

Average cloud cover in December - Round Mountain, CA
  • Average cloud cover in December: 38

The month with the most cloud cover is March (Cloud cover 42).
Months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in December
Round Mountain, CA

Average visibility in December - Round Mountain, CA
  • Average visibility in December: 5mi

Months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, March and December (5mi).

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