December weather forecast
Gualala, CA

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Weather in December

The first month of the winter, December, is still a cool month in Gualala, California, with an average temperature ranging between min 39.9°F (4.4°C) and max 54.7°F (12.6°C).

Temperature

Gualala's December weather reaches an average high of 54.7°F (12.6°C) and an average low of 39.9°F (4.4°C), making it the coldest month.

Humidity

In December, the average relative humidity in Gualala is 76%.

Rainfall

In December, the rain falls for 11.8 days. Throughout December, 3.54" (90mm) of precipitation is accumulated. In Gualala, during the entire year, the rain falls for 83.1 days and collects up to 21.38" (543mm) of precipitation.

Snowfall

In Gualala, snow does not fall in January, March through December.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:14 am and sunset at 4:52 pm. On the last day of December, in Gualala, sunrise is at 7:32 am and sunset at 5:02 pm PST.

Sunshine

December has the least sunshine of the year, with an average of 5.4h of sunshine.

UV index

February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 in December converts into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

What part of the year is the coldest in Gualala?

The month of December sees the average lowest temperatures in Gualala, reaching 54.7°F (12.6°C) at the peak and 39.9°F (4.4°C) at the low.

What are the temperatures in Gualala in December?

December temperatures in Gualala, California, vary between a high-temperature of 54.7°F (12.6°C) and a low-temperature of 39.9°F (4.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, in August is calculated to be 87.8°F (31°C).

What is the average humidity in December in Gualala?

In December, the average relative humidity in Gualala, California, is 76%.

How much does it rain in Gualala in December?

In Gualala, California, during December, the rain falls for 11.8 days and regularly aggregates up to 3.54" (90mm) of precipitation.

When it does not snow in Gualala?

January, March through December are months without snowfall.

What is the month with the shortest days in Gualala?

December has the shortest days of the year in Gualala, with an average of 9h and 30min of daylight.

How many hours of daylight does Gualala have in December?

The average day length in December in Gualala is 9h and 31min.

When is the sunrise / sunset in December in Gualala?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 4:52 pm. On the last day of the month, in Gualala, sunrise is at 7:32 am and sunset at 5:02 pm PST.

What is the month with the least sunshine in Gualala?

With an average of 5.4h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Gualala have in December?

In December, the average sunshine duration is 5.4h.

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

The months with the lowest UV index are February, November and December, with an average maximum UV index of 3.

What is the UV index intensity in December in Gualala?

In December, the average daily maximum UV index in Gualala is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Gualala, CA

Average temperature in December - Gualala, CA
  • Average high temperature in December: 54.7°F

The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (54.7°F).

  • Average low temperature in December: 39.9°F

The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (39.9°F).

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Average pressure in December
Gualala, CA

Average pressure in December - Gualala, CA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in December
Gualala, CA

Average wind speed in December - Gualala, CA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is May (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

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Average humidity in December
Gualala, CA

Average humidity in December - Gualala, CA
  • Average humidity in December: 76%

The month with the highest relative humidity is March (78%).
The months with the lowest relative humidity are July and September (60%).

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Average rainfall in December
Gualala, CA

Average rainfall in December - Gualala, CA
  • Average rainfall in December: 3.54"

The wettest month (with the highest rainfall) is February (4.49").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Gualala, CA

Average rainfall days in December - Gualala, CA
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is March (15 days).
The month with the least rainy days is August (0.9 days).

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Average snowfall in December
Gualala, CA

Average snowfall in December - Gualala, CA
  • Average snowfall in December: 0"

The month with the highest snowfall is February (0.2").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Gualala, CA

Average snowfall days in December - Gualala, CA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in December / Average sunshine in December - Gualala, 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 months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days in December
Gualala, CA

Average sunshine days in December - Gualala, CA
  • Average sunshine days in December: 17.5 days

The months with the most sunshine days are July and August (29.6 days).
The month with the least sunshine days is March (14.6 days).

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Average UV index in December
Gualala, CA

Average UV index in December - Gualala, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in December
Gualala, CA

Average cloud cover in December - Gualala, CA
  • Average cloud cover in December: 40

The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 6).

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Average visibility in December
Gualala, CA

Average visibility in December - Gualala, 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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Gualala, California, USA

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