December weather forecast and climate
Cobb, CA

Weather in December

The first month of the winter, December, is still a cool month in Cobb, California, with average temperature ranging between min 38.1°F (3.4°C) and max 52.7°F (11.5°C).

Temperature

The coldest month is December, with an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 38.1°F (3.4°C).

Humidity

In Cobb, the average relative humidity is 72%.

Rainfall

In Cobb, during December, the rain falls for 11.2 days and regularly aggregates up to 3.11" (79mm) of precipitation. Throughout the year, there are 79.8 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Cobb. In Cobb, during December, snow falls for 0.2 days and regularly aggregates up to 0.08" (2mm) of snow. Throughout the year, in Cobb, there are 1.8 snowfall days, and 0.98" (25mm) of snow is accumulated.

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

Months with the lowest UV index are November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV rays for the ordinary 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. 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 Cobb?

The coldest month in Cobb is December, with an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 38.1°F (3.4°C).

What is the temperature in December in Cobb?

In December, the average high-temperature is 52.7°F (11.5°C), and the average low-temperature is 38.1°F (3.4°C).

What is the average humidity in December in Cobb?

The average relative humidity in December in Cobb is 72%.

How much does it rain in Cobb in December?

In Cobb, during December, the rain falls for 11.2 days and regularly aggregates up to 3.11" (79mm) of precipitation.

How many days does it snow in December in Cobb?

In Cobb, California, in December, during 0.2 snowfall days, 0.08" (2mm) of snow is typically accumulated.

What is the month with the shortest days in Cobb?

December has the shortest days of the year in Cobb, with an average of 9.5h of daylight.

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

The average length of the day in December in Cobb is 9.5h.

What is the month with the least sunshine in Cobb?

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

How long on average sun shines in December in Cobb?

The average sunshine in December is 5.3h.

What are the months with the lowest UV index in Cobb?

Months with the lowest UV index in Cobb are November and December, with an average maximum UV index of 2.

How high is the UV index in December in Cobb?

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

Average temperature in December
Cobb, CA

Average temperature in December - Cobb, CA
  • Average high temperature in December: 52.7°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in December: 38.1°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).

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Average pressure in December
Cobb, CA

Average pressure in December - Cobb, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June and August (29.91").

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Average wind speed in December
Cobb, CA

Average wind speed in December - Cobb, CA
  • Average wind speed in December: 4.7mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in December
Cobb, CA

Average humidity in December - Cobb, CA
  • Average humidity in December: 72%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (44%).

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Average rainfall in December
Cobb, CA

Average rainfall in December - Cobb, CA
  • Average rainfall in December: 3.11"

The wettest month (with the highest rainfall) is February (3.7").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Cobb, CA

Average rainfall days in December - Cobb, CA
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is March (13.9 days).
Months with the least rainy days are July and August (1.1 days).

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Average snowfall in December
Cobb, CA

Average snowfall in December - Cobb, CA
  • Average snowfall in December: 0.08"

The month with the highest snowfall is February (0.51").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Cobb, CA

Average snowfall days in December - Cobb, CA
  • Average snowfall days in December: 0.2 days

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

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

Average daylight in December / Average sunshine in December - Cobb, CA
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.3h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in December
Cobb, CA

Average sunshine days in December - Cobb, CA
  • Average sunshine days in December: 19 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).

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Average UV index in December
Cobb, CA

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

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in December
Cobb, CA

Average cloud cover in December - Cobb, CA
  • Average cloud cover in December: 41

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in December
Cobb, CA

Average visibility in December - Cobb, CA
  • Average visibility in December: 6mi

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

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