December weather forecast
Cerritos, CA

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Weather in December

December, the first month of the winter in Cerritos, is also an enjoyable month, with an average temperature ranging between min 51.4°F (10.8°C) and max 64°F (17.8°C).

Temperature

Temperature records mark December as the coldest month, with highs averaging 64°F (17.8°C) and lows at 51.4°F (10.8°C).

Humidity

The average relative humidity in December in Cerritos, California, is 56%.

Rainfall

December is the month with the most rainfall. Rain falls for 4.9 days and accumulates 0.55" (14mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 9h and 54min of daylight.
On the first day of December, sunrise is at 6:39 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 4:54 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 6.7h of sunshine.

UV index

The months with the lowest UV index are February, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: During December, 4 as the daily maximum UV index converts into the following advice:
Be vigilant - Preventing sunburn is recommended. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What time of the year is the coldest in Cerritos?

The month of December sees the average lowest temperatures, reaching 64°F (17.8°C) at the peak and 51.4°F (10.8°C) at the low.

What is the temperature in December in Cerritos?

December temperatures in Cerritos vary between a high-temperature of 64°F (17.8°C) and a low-temperature of 51.4°F (10.8°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 84.2°F (29°C).

What is the average humidity in December in Cerritos?

In Cerritos, the average relative humidity in December is 56%.

What is the rainiest month in Cerritos?

December is the month with the most rainfall in Cerritos. Rain falls for 4.9 days and accumulates 0.55" (14mm) of precipitation.

How much does it rain in Cerritos in December?

In Cerritos, in December, during 4.9 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.

What is the month with the shortest days in Cerritos?

The month with the shortest days in Cerritos, California, is December, with an average of 9h and 54min of daylight.

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

In Cerritos, California, the average day length in December is 9h and 57min.

When are sunrise and sunset in December in Cerritos?

In December, on the first day of the month, sunrise is at 6:39 am and sunset at 4:43 pm. On the last day of the month, in Cerritos, California, sunrise is at 6:57 am and sunset at 4:54 pm PST.

What is the month with the least sunshine in Cerritos?

With an average of 6.7h of sunshine, December has the least sunshine of the year in Cerritos.

How many hours of sunshine does Cerritos have in December?

In Cerritos, the average sunshine duration in December is 6.7h.

What is the month with the lowest UV index in Cerritos?

The months with the lowest UV index are February, November and December, with an average maximum UV index of 4.

What is the UV index intensity in December in Cerritos?

The average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Cerritos, CA

Average temperature in December - Cerritos, CA
  • Average high temperature in December: 64°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (64°F).

  • Average low temperature in December: 51.4°F

The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (51.3°F).

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Average pressure in December
Cerritos, CA

Average pressure in December - Cerritos, CA
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).

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Average wind speed in December
Cerritos, CA

Average wind speed in December - Cerritos, CA
  • Average wind speed in December: 5.3mph

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are September and October (4.8mph).

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Average humidity in December
Cerritos, CA

Average humidity in December - Cerritos, CA
  • Average humidity in December: 56%

The month with the highest relative humidity is June (67%).
The month with the lowest relative humidity is November (52%).

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Average rainfall in December
Cerritos, CA

Average rainfall in December - Cerritos, CA
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is December (0.55").
The driest month (with the least rainfall) is June (0").

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Average rainfall days in December
Cerritos, CA

Average rainfall days in December - Cerritos, CA
  • Average rainfall days in December: 4.9 days

The month with the highest number of rainy days is March (5.6 days).
The month with the least rainy days is June (0.6 days).

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

Average daylight in December / Average sunshine in December - Cerritos, CA
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 6h and 4min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in December
Cerritos, CA

Average sunshine days in December - Cerritos, CA
  • Average sunshine days in December: 24.6 days

The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22.9 days).

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Average UV index in December
Cerritos, CA

Average UV index in December - Cerritos, CA
  • Average UV index in December: 4

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are February, November and December (UV index 4).

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Average cloud cover in December
Cerritos, CA

Average cloud cover in December - Cerritos, CA
  • Average cloud cover in December: 22

The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in December
Cerritos, CA

Average visibility in December - Cerritos, 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).

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Cerritos, California, USA

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