December weather forecast and climate
Hat Creek, CA

Weather in December

The first month of the winter, December, is also a frosty month in Hat Creek, California, with temperature in the range of an average high of 43.3°F (6.3°C) and an average low of 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

The average relative humidity is 76%.

Rainfall

In December, in Hat Creek, California, the rain falls for 12.5 days. Throughout December, 4.21" (107mm) of precipitation is accumulated. Throughout the year, there are 105 rainfall days, and 24.69" (627mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Hat Creek, California, snow falls for 7.5 days, with typically accumulated 8.11" (206mm) of snow. 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.

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Hat Creek?

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 Hat Creek.

What is the temperature in December in Hat Creek?

In Hat Creek, 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 Hat Creek?

In December, the average relative humidity in Hat Creek is 76%.

How many days does it rain in December in Hat Creek?

In December, the rain falls for 12.5 days. Throughout December, 4.21" (107mm) of precipitation is accumulated.

How many days does it snow in December in Hat Creek?

In December, in Hat Creek, California, it is snowing for 7.5 days. Throughout December, 8.11" (206mm) of snow is accumulated.

What is the month with the shortest days in Hat Creek?

December has the shortest days of the year, with an average of 9.3h of daylight.

How many hours of daylight does Hat Creek have in December?

In December, the average length of the day in Hat Creek, California, is 9.3h.

What is the month with the least sunshine in Hat Creek?

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

How many hours of sunshine does Hat Creek have in December?

In Hat Creek, California, the average sunshine in December is 5.7h.

What are the months with the lowest UV index in Hat Creek?

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 Hat Creek?

The average daily maximum UV index in December in Hat Creek, California, is 2. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.

Average temperature in December
Hat Creek, CA

Average temperature in December - Hat Creek, 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
Hat Creek, CA

Average pressure in December - Hat Creek, 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
Hat Creek, CA

Average wind speed in December - Hat Creek, 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
Hat Creek, CA

Average humidity in December - Hat Creek, 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
Hat Creek, CA

Average rainfall in December - Hat Creek, 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
Hat Creek, CA

Average rainfall days in December - Hat Creek, 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
Hat Creek, CA

Average snowfall in December - Hat Creek, 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
Hat Creek, CA

Average snowfall days in December - Hat Creek, 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
Hat Creek, CA

Average daylight in December / Average sunshine in December - Hat Creek, 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
Hat Creek, CA

Average sunshine days in December - Hat Creek, 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
Hat Creek, CA

Average UV index in December - Hat Creek, 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
Hat Creek, CA

Average cloud cover in December - Hat Creek, 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
Hat Creek, CA

Average visibility in December - Hat Creek, 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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