December weather forecast and climate
Hayfork, CA

Weather in December

The first month of the winter, December, is still a chilly month in Hayfork, California, with average temperature ranging between min 30.2°F (-1°C) and max 46°F (7.8°C).

Temperature

With an average high-temperature of 46°F (7.8°C) and an average low-temperature of 30.2°F (-1°C), December is the coldest month.

Humidity

In Hayfork, the average relative humidity is 80%.

Rainfall

December is the month with the most rainfall in Hayfork. Rain falls for 11.5 days and accumulates 4.17" (106mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Hayfork, in December, snow falls for 3.8 days, with typically accumulated 5.08" (129mm) of snow. In Hayfork, during the entire year, snow falls for 21.4 days, and aggregates up to 28.74" (730mm) of snow.

Daylight

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

Sunshine

December has the least sunshine of the year in Hayfork, with an average of 4.7h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Hayfork. A UV Index of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 in December transform into the following instructions:
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. 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. 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 Hayfork?

December is the coldest month, with an average high-temperature of 46°F (7.8°C) and an average low-temperature of 30.2°F (-1°C).

What is the temperature in December in Hayfork?

In Hayfork, in December, the average high-temperature is 46°F (7.8°C), and the average low-temperature is 30.2°F (-1°C).

What is the average humidity in December in Hayfork?

In Hayfork, the average relative humidity in December is 80%.

How much does it rain in Hayfork in December?

In Hayfork, California, in December, it is raining for 11.5 days, with typically 4.17" (106mm) of accumulated precipitation.

What is the wettest month in Hayfork?

The month with the most rainfall is December when the rain falls for 11.5 days and typically aggregates up to 4.17" (106mm) of precipitation.

How much does it snow in Hayfork in December?

In Hayfork, during December, snow falls for 3.8 days and regularly aggregates up to 5.08" (129mm) of snow.

What is the month with the shortest days in Hayfork?

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

How many hours of daylight does Hayfork have in December?

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

What is the month with the least sunshine in Hayfork?

December has the least sunshine of the year, with an average of 4.7h of sunshine.

How long on average sun shines in December in Hayfork?

The average sunshine in December in Hayfork is 4.7h.

When is the lowest UV index in Hayfork?

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

What is the UV index intensity in December in Hayfork?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Hayfork, CA

Average temperature in December - Hayfork, CA
  • Average high temperature in December: 46°F

The warmest months (with the highest average high temperature) are July and August (86.5°F).
The month with the lowest average high temperature is December (46°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (51.1°F).
The coldest month (with the lowest average low temperature) is December (30.2°F).

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Average pressure in December
Hayfork, CA

Average pressure in December - Hayfork, CA
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is August (29.93").

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Average wind speed in December
Hayfork, CA

Average wind speed in December - Hayfork, CA
  • Average wind speed in December: 4mph

The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

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Average humidity in December
Hayfork, CA

Average humidity in December - Hayfork, CA
  • Average humidity in December: 80%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (52%).

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Average rainfall in December
Hayfork, CA

Average rainfall in December - Hayfork, CA
  • Average rainfall in December: 4.17"

The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in December
Hayfork, CA

Average rainfall days in December - Hayfork, CA
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in December
Hayfork, CA

Average snowfall in December - Hayfork, CA
  • Average snowfall in December: 5.08"

The month with the highest snowfall is February (7.52").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Hayfork, CA

Average snowfall days in December - Hayfork, CA
  • Average snowfall days in December: 3.8 days

The month with the highest number of snowfall days is February (5 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.7h

Months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 4.7h).

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Average sunshine days in December
Hayfork, CA

Average sunshine days in December - Hayfork, CA
  • Average sunshine days in December: 16.6 days

The month with the most sunshine days is July (26 days).
The month with the least sunshine days is March (13.6 days).

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Average UV index in December
Hayfork, CA

Average UV index in December - Hayfork, 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
Hayfork, CA

Average cloud cover in December - Hayfork, CA
  • Average cloud cover in December: 51

The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in December
Hayfork, CA

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

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

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