December weather forecast
Mackenson, CA

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Weather in December

The first month of the winter, December, is still a cool month in Mackenson, California, with an average temperature ranging between max 55°F (12.8°C) and min 41.7°F (5.4°C).

Temperature

December stands out as Mackenson's coldest month, with temperatures ranging between an average high of 55°F (12.8°C) and a low of 41.7°F (5.4°C).

Humidity

In Mackenson, the average relative humidity in December is 71%.

Rainfall

In Mackenson, in December, it is raining for 9.7 days, with typically 1.73" (44mm) of accumulated precipitation. Throughout the year, there are 68.7 rainfall days, and 11.18" (284mm) of precipitation is accumulated.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year in Mackenson.
On the first day of December, sunrise is at 7:04 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:57 pm PST.

Sunshine

With an average of 5.9h of sunshine, December has the least sunshine of the year in Mackenson.

UV index

The months with the lowest UV index in Mackenson are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 3 in December suggests the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Frequently asked questions

What are the coldest months in Mackenson?

Mackenson's temperature records reveal December as the coldest month, marked by average highs of 55°F (12.8°C) and lows of 41.7°F (5.4°C).

What are December temperatures in Mackenson?

December temperatures vary between a high-temperature of 55°F (12.8°C) and a low-temperature of 41.7°F (5.4°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is appraised at 89.6°F (32°C).

What is the average humidity in December in Mackenson?

In December, the average relative humidity in Mackenson, California, is 71%.

How many days does it rain in December in Mackenson?

In Mackenson, California, in December, during 9.7 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.

What is the month with the shortest days in Mackenson?

December has the shortest days of the year in Mackenson, California, with an average of 9h and 36min of daylight.

How many hours of daylight does Mackenson have in December?

In Mackenson, the average day length in December is 9h and 34min.

When is the sunrise / sunset in December in Mackenson?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:47 pm. On the last day of the month, in Mackenson, California, sunrise is at 7:22 am and sunset at 4:57 pm PST.

What is the month with the least sunshine in Mackenson?

The month with the least sunshine is December, with an average of 5.9h of sunshine.

How many hours of sunshine does Mackenson have in December?

The average sunshine duration in December in Mackenson, California, is 5.9h.

When is the lowest UV index in Mackenson?

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

What is the UV index reading in December in Mackenson?

In December, the average daily maximum UV index in Mackenson, California, is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Mackenson, CA

Average temperature in December - Mackenson, CA
  • Average high temperature in December: 55°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in December: 41.7°F

The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in December
Mackenson, CA

Average pressure in December - Mackenson, CA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Mackenson, CA

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

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

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Average humidity in December
Mackenson, CA

Average humidity in December - Mackenson, CA
  • Average humidity in December: 71%

The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).

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Average rainfall in December
Mackenson, CA

Average rainfall in December - Mackenson, CA
  • Average rainfall in December: 1.73"

The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").

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Average rainfall days in December
Mackenson, CA

Average rainfall days in December - Mackenson, CA
  • Average rainfall days in December: 9.7 days

The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).

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

Average daylight in December / Average sunshine in December - Mackenson, CA
  • Average daylight in December: 9h and 4min

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 36min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in December
Mackenson, CA

Average sunshine days in December - Mackenson, CA
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).

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Average UV index in December
Mackenson, CA

Average UV index in December - Mackenson, 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 January, February, November and December (UV index 3).

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Average cloud cover in December
Mackenson, CA

Average cloud cover in December - Mackenson, CA
  • Average cloud cover in December: 35

The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in December
Mackenson, CA

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

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