December weather forecast
Santa Ana, CA

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Night lights of the street in Santa Ana, California, with palm trees lining the street
Night lights of the street in Santa Ana, California, with palm trees lining the street

Weather in December

Santa Ana, California, in December experiences winter conditions, with temperatures dipping down to 63.7°F (17.6°C) on average. The month sees the highest rainfall of the year, totaling 1.54" (39mm), providing a much-needed hydration to the region. As the city coordinates with the natural cycle of the seasons, cloud coverage is at the highest, standing at 23%. To add to the calm, the average wind speed during December stays at 5mph (8km/h), making it a serene month.

Temperature

In Santa Ana, California, the month of December is known for its lowest average temperatures, reaching a high of 63.7°F (17.6°C) and a low of 50.7°F (10.4°C).

Humidity

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

Rainfall

December is the month with the most rainfall. Rain falls for 6.3 days and accumulates 1.54" (39mm) of precipitation.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year.
On the first day of December in Santa Ana, sunrise is at 6:38 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:53 pm PST.

Sunshine

December has the least sunshine of the year, with an average of 6.7h of sunshine.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: In December, a daily maximum UV index of 4 leads to the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Frequently asked questions

What is the coldest month in Santa Ana?

December stands out as Santa Ana's coldest month, with an average high-temperature of 63.7°F (17.6°C) and a low-temperature of 50.7°F (10.4°C).

What are the temperatures in Santa Ana in December?

The high-temperature in Santa Ana, California, during December is 63.7°F (17.6°C) and the low-temperature is 50.7°F (10.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in September is evaluated at 84.2°F (29°C).

What is the average humidity in December in Santa Ana?

In Santa Ana, California, the average relative humidity in December is 56%.

What is the wettest month in Santa Ana?

December is the month with the most rainfall. Rain falls for 6.3 days and accumulates 1.54" (39mm) of precipitation.

How many days does it rain in December in Santa Ana?

In Santa Ana, California, during December, the rain falls for 6.3 days and regularly aggregates up to 1.54" (39mm) of precipitation.

What is the month with the shortest days in Santa Ana?

With an average of 10h and 0min of daylight, December has the shortest days of the year.

How many hours of daylight does Santa Ana have in December?

The average day length in December in Santa Ana, California, is 9h and 58min.

When are sunrise and sunset in December in Santa Ana?

On the first day of December, sunrise is at 6:38 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:53 pm PST.

What is the month with the least sunshine in Santa Ana?

December has the least sunshine of the year in Santa Ana, with an average of 6.7h of sunshine.

How long on average sun shines in December in Santa Ana?

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

What is the month with the lowest UV index in Santa Ana?

The months with the lowest UV index in Santa Ana, California, are January, February, November and December, with an average maximum UV index of 4.

What is the UV index intensity in December in Santa Ana?

In Santa Ana, California, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
Santa Ana, CA

Average temperature in December - Santa Ana, CA
  • Average high temperature in December: 63.7°F

The warmest month (with the highest average high temperature) is August (83.1°F).
The month with the lowest average high temperature is December (63.7°F).

  • Average low temperature in December: 50.7°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).

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Average pressure in December
Santa Ana, CA

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

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Santa Ana, CA

Average wind speed in December - Santa Ana, CA
  • Average wind speed in December: 5mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).

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Average humidity in December
Santa Ana, CA

Average humidity in December - Santa Ana, CA
  • Average humidity in December: 56%

The month with the highest relative humidity is June (66%).
The month with the lowest relative humidity is November (52%).

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Average rainfall in December
Santa Ana, CA

Average rainfall in December - Santa Ana, CA
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.08").

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Average rainfall days in December
Santa Ana, CA

Average rainfall days in December - Santa Ana, CA
  • Average rainfall days in December: 6.3 days

The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (1.7 days).

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Average daylight in December /
Average sunshine in December
Santa Ana, CA

Average daylight in December / Average sunshine in December - Santa Ana, CA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • 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
Santa Ana, CA

Average sunshine days in December - Santa Ana, CA
  • Average sunshine days in December: 23.6 days

The month with the most sunshine days is January (25 days).
The month with the least sunshine days is February (20.8 days).

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Average UV index in December
Santa Ana, CA

Average UV index in December - Santa Ana, 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 January, February, November and December (UV index 4).

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Average cloud cover in December
Santa Ana, CA

Average cloud cover in December - Santa Ana, CA
  • Average cloud cover in December: 23

The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in December
Santa Ana, CA

Average visibility in December - Santa Ana, 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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Santa Ana, California, USA

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