December weather forecast
Truckhaven, CA

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Weather in December

December, the first month of the winter in Truckhaven, is still a mild month, with an average temperature fluctuating between 59.4°F (15.2°C) and 43.3°F (6.3°C).

Temperature

December is the month that records the lowest temperatures, with averages ranging from a high of 59.4°F (15.2°C) to a low of 43.3°F (6.3°C).

Humidity

With an average relative humidity of 50%, December is the most humid month.

Rainfall

In Truckhaven, in December, it is raining for 5.7 days, with typically 0.87" (22mm) of accumulated precipitation. In Truckhaven, during the entire year, the rain falls for 60.2 days and collects up to 7.68" (195mm) of precipitation.

Daylight

The month with the shortest days is December, with an average of 10h and 0min of daylight.
On the first day of December, sunrise is at 6:30 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 4:47 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 6.8h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: In December, an average UV index of 3 transforms into the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Truckhaven's December weather, marked by an average high temperature of 59.4°F (15.2°C) and an average low temperature of 43.3°F (6.3°C), is the coldest in the year.

What is the usual temperature for Truckhaven in December?

During December, Truckhaven experiences an average high-temperature of 59.4°F (15.2°C) and a low-temperature of 43.3°F (6.3°C).

What is the most humid month?

With an average relative humidity of 50%, December is the most humid month.

What is the average humidity in December in Truckhaven?

The average relative humidity in December is 50%.

How much does it rain in December?

In December, the rain falls for 5.7 days. Throughout December, 0.87" (22mm) of precipitation is accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Truckhaven have in December?

In December, the average day length is 9h and 59min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:30 am and sunset at 4:36 pm. On the last day of the month, in Truckhaven, California, sunrise is at 6:47 am and sunset at 4:47 pm PST.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 6.8h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 6.8h.

What is the month with the lowest UV index?

With an average maximum UV index of 3, December is the month with the lowest UV index.

How high is the UV index in December?

The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes 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
Truckhaven, CA

Average temperature in December - Truckhaven, CA
  • Average high temperature in December: 59.4°F

The warmest months (with the highest average high temperature) are July and August (93.7°F).
The month with the lowest average high temperature is December (59.4°F).

  • Average low temperature in December: 43.3°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is December (43.3°F).

Average pressure in December
Truckhaven, CA

Average pressure in December - Truckhaven, CA
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).

Average wind speed in December
Truckhaven, CA

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

The windiest month (with the highest average wind speed) is May (8.6mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).

Average humidity in December
Truckhaven, CA

Average humidity in December - Truckhaven, CA
  • Average humidity in December: 50%

The month with the highest relative humidity is December (50%).
The months with the lowest relative humidity are June and August (34%).

Average rainfall in December
Truckhaven, CA

Average rainfall in December - Truckhaven, CA
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is July (1.38").
The driest months (with the least rainfall) are May and June (0.12").

Average rainfall days in December
Truckhaven, CA

Average rainfall days in December - Truckhaven, CA
  • Average rainfall days in December: 5.7 days

The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is June (1.8 days).

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

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

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 5min

The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

Average sunshine days in December
Truckhaven, CA

Average sunshine days in December - Truckhaven, CA
  • Average sunshine days in December: 24.5 days

The month with the most sunshine days is June (27.5 days).
The month with the least sunshine days is July (20.4 days).

Average UV index in December
Truckhaven, CA

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

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in December
Truckhaven, CA

Average cloud cover in December - Truckhaven, CA
  • Average cloud cover in December: 21

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).

Average visibility in December
Truckhaven, CA

Average visibility in December - Truckhaven, 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).

Truckhaven, California, USA

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