December weather forecast
Round Mountain, CA

Share

Weather in December

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

Temperature

December proves to be the coldest month, recording an average maximum temperature of 43.3°F (6.3°C) and a minimum temperature of 27.9°F (-2.3°C).

Humidity

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

Rainfall

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

Snowfall

January through May, October through December are months with snowfall. In Round Mountain, in December, snow falls for 7.5 days, with typically accumulated 8.11" (206mm) of snow. In Round Mountain, during the entire year, snow falls for 36.7 days and aggregates up to 43.62" (1108mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December in Round Mountain, sunrise is at 7:13 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:50 pm PST.

Sunshine

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

UV index

The months with the lowest UV index 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 exposure to the Sun's UV rays for the average person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
[Resources]

Frequently asked questions

What is the coldest month in Round Mountain?

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

How cold is it in Round Mountain in December?

In Round Mountain, 43.3°F (6.3°C) is the average high-temperature and 27.9°F (-2.3°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is estimated at 86°F (30°C).

What is the average humidity in December in Round Mountain?

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

How much does it rain in Round Mountain in December?

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

How many days does it snow in December in Round Mountain?

In Round Mountain, California, in December, snow falls for 7.5 days, with typically accumulated 8.11" (206mm) of snow.

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

With an average of 9h and 18min of daylight, December has the shortest days of the year in Round Mountain.

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

The average day length in December in Round Mountain is 9h and 19min.

When are sunrise and sunset in December in Round Mountain?

In December, on the first day of the month, sunrise is at 7:13 am and sunset at 4:40 pm. On the last day of the month, in Round Mountain, California, sunrise is at 7:31 am and sunset at 4:50 pm PST.

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

December has the least sunshine of the year, with an average of 5.7h of sunshine.

How long on average sun shines in December in Round Mountain?

In December, the average sunshine duration is 5.7h.

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

The months with the lowest UV index in Round Mountain, California, are January, February, November and December, with an average maximum UV index of 2.

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

The average daily maximum UV index in December in Round Mountain, California, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's 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
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).

[Resources]

Average pressure in December
Round Mountain, CA

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

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

[Resources]

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).

[Resources]

Average humidity in December
Round Mountain, CA

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

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

[Resources]

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").

[Resources]

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).

[Resources]

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").
The months with the least snowfall are June, July, August and September (0").

[Resources]

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).
The months with the least snowfall days are June, July and August (0 days).

[Resources]

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: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

[Resources]

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).

[Resources]

Average UV index in December
Round Mountain, CA

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

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

[Resources]

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).
The months with the least cloud cover are July and August (Cloud cover 6).

[Resources]

Average visibility in December
Round Mountain, CA

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

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

[Resources]

Round Mountain, California, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location