December weather forecast
Tacna, AZ

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Weather in December

December, the first month of the winter in Tacna, is still a refreshing month, with an average temperature ranging between min 49.8°F (9.9°C) and max 64.9°F (18.3°C).

Temperature

The coldest temperatures occur during December, when averages reach a peak of 64.9°F (18.3°C) and a low of 49.8°F (9.9°C).

Humidity

The most humid month is December, with an average relative humidity of 39%.

Rainfall

In Tacna, in December, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In Tacna, during the entire year, the rain falls for 38.1 days and collects up to 3.9" (99mm) 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 the month, sunrise is at 7:20 am and sunset at 5:29 pm. On the last day of December, sunrise is at 7:37 am and sunset at 5:40 pm MST.

Sunshine

December has the least sunshine of the year, with an average of 7.1h of sunshine.

UV index

The months with the lowest UV index are November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 in December interprets into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What is the coldest month in Tacna?

December is the month when Tacna, Arizona, experiences its coldest temperatures, averaging a high of 64.9°F (18.3°C) and a low of 49.8°F (9.9°C).

What are the temperatures in Tacna in December?

Tacna in December has an average high-temperature of 64.9°F (18.3°C) and an average low-temperature of 49.8°F (9.9°C).

What is the most humid month in Tacna?

The most humid month in Tacna, Arizona, is December, with an average relative humidity of 39%.

What is the average humidity in December in Tacna?

In Tacna, Arizona, the average relative humidity in December is 39%.

How many days does it rain in December in Tacna?

In Tacna, Arizona, during December, the rain falls for 3.5 days and regularly aggregates up to 0.28" (7mm) of precipitation.

What is the month with the shortest days in Tacna?

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

How many hours of daylight does Tacna have in December?

In Tacna, the average day length in December is 10h and 2min.

When is the sunrise / sunset in December in Tacna?

On the first day of December, sunrise is at 7:20 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:40 pm MST.

What is the month with the least sunshine in Tacna?

December has the least sunshine of the year in Tacna, Arizona, with an average of 7.1h of sunshine.

How many hours of sunshine does Tacna have in December?

In December, the average sunshine duration is 7.1h.

What are the months with the lowest UV index in Tacna?

November and December, with an average maximum UV index of 4, are months with the lowest UV index in Tacna, Arizona.

What is the UV index reading in December in Tacna?

The average daily maximum UV index in December in Tacna, Arizona, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe 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
Tacna, AZ

Average temperature in December - Tacna, AZ
  • Average high temperature in December: 64.9°F

The warmest month (with the highest average high temperature) is July (103.8°F).
The month with the lowest average high temperature is December (64.9°F).

  • Average low temperature in December: 49.8°F

The month with the highest average low temperature is August (85.6°F).
The coldest months (with the lowest average low temperature) are January and December (49.8°F).

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Average pressure in December
Tacna, AZ

Average pressure in December - Tacna, AZ
  • Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.73"Hg).

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Average wind speed in December
Tacna, AZ

Average wind speed in December - Tacna, AZ
  • Average wind speed in December: 6mph

The windiest month (with the highest average wind speed) is July (8.4mph).
The calmest months (with the lowest average wind speed) are November and December (6mph).

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Average humidity in December
Tacna, AZ

Average humidity in December - Tacna, AZ
  • Average humidity in December: 39%

The month with the highest relative humidity is December (39%).
The month with the lowest relative humidity is June (21%).

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Average rainfall in December
Tacna, AZ

Average rainfall in December - Tacna, AZ
  • Average rainfall in December: 0.28"

The wettest month (with the highest rainfall) is July (0.71").
The driest month (with the least rainfall) is May (0.04").

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Average rainfall days in December
Tacna, AZ

Average rainfall days in December - Tacna, AZ
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is July (7.6 days).
The month with the least rainy days is May (0.9 days).

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Average daylight in December /
Average sunshine in December
Tacna, AZ

Average daylight in December / Average sunshine in December - Tacna, AZ
  • 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: 7h and 1min

The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).

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Average sunshine days in December
Tacna, AZ

Average sunshine days in December - Tacna, AZ
  • Average sunshine days in December: 27.4 days

The month with the most sunshine days is May (29.7 days).
The month with the least sunshine days is July (19.8 days).

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Average UV index in December
Tacna, AZ

Average UV index in December - Tacna, AZ
  • Average UV index in December: 4

The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are November and December (UV index 4).

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Average cloud cover in December
Tacna, AZ

Average cloud cover in December - Tacna, AZ
  • Average cloud cover in December: 17

The month with the most cloud cover is December (Cloud cover 17).
The month with the least cloud cover is June (Cloud cover 5).

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Average visibility in December
Tacna, AZ

Average visibility in December - Tacna, AZ
  • 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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Tacna, Arizona, USA

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