December weather forecast
Cobb, CA

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Weather in December

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

Temperature

December is the month when Cobb, California, experiences its coldest temperatures, averaging a high of 52.7°F (11.5°C) and a low of 38.1°F (3.4°C).

Humidity

In Cobb, the average relative humidity in December is 72%.

Rainfall

In Cobb, in December, during 11.2 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, there are 79.8 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

Snowfall

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

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:11 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:29 am and sunset at 4:59 pm PST.

Sunshine

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

UV index

November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cobb. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

Cobb's December weather, with an average high temperature of 52.7°F (11.5°C) and an average low temperature of 38.1°F (3.4°C), tends to be the coldest of the year.

What is the average December temperature?

The high-temperature, in December, in Cobb, is 52.7°F (11.5°C), while the low-temperature averages to 38.1°F (3.4°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What is the average humidity in December?

In Cobb, the average relative humidity in December is 72%.

How many days does it rain in December?

In Cobb, in December, during 11.2 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

How much does it snow in December?

In Cobb, during December, snow falls for 0.2 days and regularly aggregates up to 0.08" (2mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Cobb have in December?

In December, the average day length is 9h and 30min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:59 pm PST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.3h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 5.3h.

What is the month with the lowest UV index?

The months with the lowest UV index 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 is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
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
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).

Average pressure in December
Cobb, CA

Average pressure in December - Cobb, 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 (29.91"Hg).

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).

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%).

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").

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).
The months with the least rainy days are July and August (1.1 days).

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").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 48min).
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).

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).

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).
The months with the lowest UV index are November and December (UV index 2).

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).

Average visibility in December
Cobb, CA

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

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

Cobb, California, USA

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