December weather forecast
Knob, CA

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Weather in December

The first month of the winter, December, is also a frosty month in Knob, California, with an average temperature varying between 46°F (7.8°C) and 30.2°F (-1°C).

Temperature

In Knob, the lowest average temperatures are observed in December, with a high of 46°F (7.8°C) and a low of 30.2°F (-1°C).

Humidity

The average relative humidity in December in Knob is 80%.

Rainfall

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

Snowfall

January through May, November and December are months with snowfall. In Knob, California, in December, during 3.8 snowfall days, 5.08" (129mm) of snow is typically accumulated. Throughout the year, there are 21.4 snowfall days, and 28.74" (730mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:46 pm. On the last day of December, in Knob, sunrise is at 7:34 am and sunset at 4:55 pm PST.

Sunshine

The month with the least sunshine in Knob is December, 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 Knob. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding the Sun during its peak radiation time around midday is a healthy practice. 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. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What time of the year is the coldest in Knob?

In Knob, California, the average lowest temperatures are observed in December, with a high of 46°F (7.8°C) and a low of 30.2°F (-1°C).

What is the temperature in December in Knob?

In December, in Knob, the average high-temperature is 46°F (7.8°C), and the average low-temperature is 30.2°F (-1°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is evaluated at 89.6°F (32°C).

What is the average humidity in December in Knob?

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

What is the rainiest month in Knob?

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

How many days does it rain in December in Knob?

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

How many days does it snow in December in Knob?

In December, in Knob, California, it is snowing for 3.8 days. Throughout December, 5.08" (129mm) of snow is accumulated.

What is the month with the shortest days in Knob?

December has the shortest days of the year, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Knob?

In December, the average day length in Knob, California, is 9h and 21min.

When are sunrise and sunset in December in Knob?

In December, on the first day of the month, sunrise is at 7:16 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:55 pm PST.

What is the month with the least sunshine in Knob?

The month with the least sunshine in Knob, California, is December, with an average of 4.7h of sunshine.

How long on average sun shines in December in Knob?

In Knob, the average sunshine duration in December is 4.7h.

When is the lowest UV index in Knob?

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

How high is the UV index in December in Knob?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from 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
Knob, CA

Average temperature in December - Knob, 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
Knob, CA

Average pressure in December - Knob, CA
  • Average pressure in December: 30.12"Hg

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

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Average wind speed in December
Knob, CA

Average wind speed in December - Knob, 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
Knob, CA

Average humidity in December - Knob, 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
Knob, CA

Average rainfall in December - Knob, 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
Knob, CA

Average rainfall days in December - Knob, 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
Knob, CA

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

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

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Average snowfall days in December
Knob, CA

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

The month with the highest number of snowfall days is February (5 days).
The 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
Knob, CA

Average daylight in December / Average sunshine in December - Knob, CA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 4min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

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Average sunshine days in December
Knob, CA

Average sunshine days in December - Knob, 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
Knob, CA

Average UV index in December - Knob, 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).

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Average cloud cover in December
Knob, CA

Average cloud cover in December - Knob, 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
Knob, CA

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

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

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Knob, California, USA

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