December weather forecast and climate
Sierraville, CA

Weather in December

The first month of the winter, December, is still a cold month in Sierraville, California, with average temperature varying between 37.2°F (2.9°C) and 21.6°F (-5.8°C).

Temperature

With an average high-temperature of 37.2°F (2.9°C) and an average low-temperature of 21.6°F (-5.8°C), December is the coldest month.

Humidity

The average relative humidity in December is 79%.

Rainfall

In December, in Sierraville, the rain falls for 6.8 days. Throughout December, 3.66" (93mm) of precipitation is accumulated. In Sierraville, during the entire year, the rain falls for 80.1 days and collects up to 22.95" (583mm) of precipitation.

Snowfall

Months with snowfall in Sierraville are January through June, September through December. December is the month with the most snowfall in Sierraville. Snow falls for 12.8 days and accumulates 22.52" (572mm) of snow.

Daylight

The month with the shortest days in Sierraville, California, is December, with an average of 9.4h of daylight.

Sunshine

In Sierraville, California, the average sunshine in December is 5.2h.

UV index

In Sierraville, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. 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 Sierraville?

December is the coldest month in Sierraville, California, with an average high-temperature of 37.2°F (2.9°C) and an average low-temperature of 21.6°F (-5.8°C).

What is the temperature in December in Sierraville?

The average high-temperature, in December, is 37.2°F (2.9°C), while the average low-temperature is 21.6°F (-5.8°C).

What is the average humidity in December in Sierraville?

In Sierraville, California, the average relative humidity in December is 79%.

How much does it rain in Sierraville in December?

In December, the rain falls for 6.8 days. Throughout December, 3.66" (93mm) of precipitation is accumulated.

How much does it snow in Sierraville in December?

In Sierraville, California, in December, snow falls for 12.8 days, with typically accumulated 22.52" (572mm) of snow.

What is the snowiest month in Sierraville?

The month with the most snowfall in Sierraville is December when snow falls for 12.8 days and typically aggregates up to 22.52" (572mm) of snow.

What is the month with the shortest days in Sierraville?

With an average of 9.4h of daylight, December has the shortest days of the year in Sierraville.

How many hours of daylight does Sierraville have in December?

The average length of the day in December in Sierraville is 9.4h.

How long on average sun shines in December in Sierraville?

In Sierraville, California, the average sunshine in December is 5.2h.

What is the UV index reading in December in Sierraville?

In Sierraville, California, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV rays.

Average temperature in December
Sierraville, CA

Average temperature in December - Sierraville, CA
  • Average high temperature in December: 37.2°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (37.2°F).

  • Average low temperature in December: 21.6°F

The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (21.6°F).

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Average pressure in December
Sierraville, CA

Average pressure in December - Sierraville, CA
  • Average pressure in December: 30.16"

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in December
Sierraville, CA

Average wind speed in December - Sierraville, CA
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).

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Average humidity in December
Sierraville, CA

Average humidity in December - Sierraville, CA
  • Average humidity in December: 79%

Months with the highest relative humidity are January and March (81%).
Months with the lowest relative humidity are July and August (40%).

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Average rainfall in December
Sierraville, CA

Average rainfall in December - Sierraville, CA
  • Average rainfall in December: 3.66"

The wettest month (with the highest rainfall) is March (4.02").
The driest month (with the least rainfall) is August (0.2").

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Average rainfall days in December
Sierraville, CA

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

The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is July (3.3 days).

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Average snowfall in December
Sierraville, CA

Average snowfall in December - Sierraville, CA
  • Average snowfall in December: 22.52"

The month with the highest snowfall is December (22.52").
Months with the least snowfall are July and August (0").

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Average snowfall days in December
Sierraville, CA

Average snowfall days in December - Sierraville, CA
  • Average snowfall days in December: 12.8 days

The month with the highest number of snowfall days is March (14.7 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Sierraville, CA

Average daylight in December / Average sunshine in December - Sierraville, CA
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is January (Average sunshine: 5h).

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Average sunshine days in December
Sierraville, CA

Average sunshine days in December - Sierraville, CA
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is March (11.8 days).

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Average UV index in December
Sierraville, CA

Average UV index in December - Sierraville, CA
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is November (UV index 1).

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Average cloud cover in December
Sierraville, CA

Average cloud cover in December - Sierraville, CA
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 7).

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Average visibility in December
Sierraville, CA

Average visibility in December - Sierraville, CA
  • Average visibility in December: 4mi

Months with the highest visibility are May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January and December (4mi).

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