December weather forecast
Potter Valley, CA

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Weather in December

The first month of the winter, December, is also a fresh month in Potter Valley, California, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 51.3°F (10.7°C).

Temperature

December is the coldest month, with the temperature often reaching an average high of 51.3°F (10.7°C) and an average low of 35.2°F (1.8°C).

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Potter Valley, in December, it is raining for 8.3 days, with typically 1.69" (43mm) of accumulated precipitation. In Potter Valley, during the entire year, the rain falls for 61.6 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

April through October and December are months without snowfall.

Daylight

The month with the shortest days in Potter Valley is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:13 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:32 am and sunset at 4:59 pm PST.

Sunshine

December has the least sunshine of the year in Potter Valley, California, with an average of 5.3h of sunshine.

UV index

The months with the lowest UV index in Potter Valley are February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the UV index of 2 transforms into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

What time of the year is the coldest in Potter Valley?

With an average high-temperature of 51.3°F (10.7°C) and an average low-temperature of 35.2°F (1.8°C), December is the coldest month in Potter Valley, California.

What is the average December temperature in Potter Valley?

In Potter Valley, in December, the average high-temperature is 51.3°F (10.7°C), and the average low-temperature is 35.2°F (1.8°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in September is appraised at 82.4°F (28°C).

What is the average humidity in December in Potter Valley?

In December, the average relative humidity is 76%.

How much does it rain in Potter Valley in December?

In Potter Valley, California, in December, it is raining for 8.3 days, with typically 1.69" (43mm) of accumulated precipitation.

When it does not snow in Potter Valley?

In Potter Valley, snow does not fall in April through October and December.

Does it snow in Potter Valley in December?

In December, in Potter Valley, California, it doesn't snow. November is the latest month when it typically snows.

What is the month with the shortest days in Potter Valley?

December has the shortest days of the year in Potter Valley, California, with an average of 9h and 30min of daylight.

What is the average length of the day in December in Potter Valley?

In December, the average day length is 9h and 27min.

When is the sunrise / sunset in December in Potter Valley?

In December, on the first day of the month, sunrise is at 7:13 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:59 pm PST.

What is the month with the least sunshine in Potter Valley?

December has the least sunshine of the year in Potter Valley, with an average of 5.3h of sunshine.

How many hours of sunshine does Potter Valley have in December?

In Potter Valley, the average sunshine duration in December is 5.3h.

What are the months with the lowest UV index in Potter Valley?

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

What is the UV index reading in December in Potter Valley?

In December, the average daily maximum UV index in Potter Valley, California, is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
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
Potter Valley, CA

Average temperature in December - Potter Valley, CA
  • Average high temperature in December: 51.3°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (51.3°F).

  • Average low temperature in December: 35.2°F

The month with the highest average low temperature is July (53.4°F).
The coldest months (with the lowest average low temperature) are February, March and December (35.2°F).

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Average pressure in December
Potter Valley, CA

Average pressure in December - Potter Valley, CA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).

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Average wind speed in December
Potter Valley, CA

Average wind speed in December - Potter Valley, CA
  • Average wind speed in December: 4.2mph

The windiest months (with the highest average wind speed) are March and April (4.6mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).

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Average humidity in December
Potter Valley, CA

Average humidity in December - Potter Valley, CA
  • Average humidity in December: 76%

The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is July (54%).

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Average rainfall in December
Potter Valley, CA

Average rainfall in December - Potter Valley, CA
  • Average rainfall in December: 1.69"

The wettest month (with the highest rainfall) is February (2.28").
The driest months (with the least rainfall) are July, August and September (0.08").

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Average rainfall days in December
Potter Valley, CA

Average rainfall days in December - Potter Valley, CA
  • Average rainfall days in December: 8.3 days

The month with the highest number of rainy days is March (10.3 days).
The months with the least rainy days are August and September (1.8 days).

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Average snowfall in December
Potter Valley, CA

Average snowfall in December - Potter Valley, CA
  • Average snowfall in December: 0"

The month with the highest snowfall is January (1.02").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").

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Average snowfall days in December
Potter Valley, CA

Average snowfall days in December - Potter Valley, CA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).

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Average daylight in December /
Average sunshine in December
Potter Valley, CA

Average daylight in December / Average sunshine in December - Potter Valley, CA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in December
Potter Valley, CA

Average sunshine days in December - Potter Valley, CA
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (20.2 days).

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Average UV index in December
Potter Valley, CA

Average UV index in December - Potter Valley, 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 February, November and December (UV index 2).

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Average cloud cover in December
Potter Valley, CA

Average cloud cover in December - Potter Valley, CA
  • Average cloud cover in December: 43

The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in December
Potter Valley, CA

Average visibility in December - Potter Valley, CA
  • Average visibility in December: 5mi

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

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Potter Valley, California, USA

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