December weather forecast and climate
Tucson, AZ

Sunset in downtown Tucson, Arizona with a skyline and a sentinel peak in the distance
Sunset in downtown Tucson, Arizona with a skyline and a sentinel peak in the distance

Weather in December

The first month of the winter, December, is also an enjoyable month in Tucson, Arizona, with average temperature fluctuating between 43°F (6.1°C) and 60.8°F (16°C).

Temperature

December is the coldest month, with an average high-temperature of 60.8°F (16°C) and an average low-temperature of 43°F (6.1°C).

Humidity

The most humid month in Tucson, Arizona, is December, with an average relative humidity of 45%.

Rainfall

In Tucson, during December, the rain falls for 6.2 days and regularly aggregates up to 0.83" (21mm) of precipitation. Throughout the year, in Tucson, there are 66.1 rainfall days, and 7.95" (202mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall in Tucson.

Daylight

December has the shortest days of the year, with an average of 10.1h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 7h of sunshine.

UV index

Months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the coldest month in Tucson?

The coldest month in Tucson is December, with an average high-temperature of 60.8°F (16°C) and an average low-temperature of 43°F (6.1°C).

What is the temperature in December in Tucson?

In December, in Tucson, the average high-temperature is 60.8°F (16°C), and the average low-temperature is 43°F (6.1°C).

What is the most humid month in Tucson?

With an average relative humidity of 45%, December is the most humid month in Tucson, Arizona.

What is the average humidity in December in Tucson?

In Tucson, the average relative humidity in December is 45%.

How many days does it rain in December in Tucson?

In Tucson, in December, during 6.2 rainfall days, 0.83" (21mm) of precipitation is typically accumulated.

Does it snow in Tucson in December?

In Tucson, in December, it doesn't snow. In January, it regularly snows.

When it does not snow in Tucson?

February through December are months without snowfall in Tucson, Arizona.

What is the month with the shortest days in Tucson?

The month with the shortest days in Tucson is December, with an average of 10.1h of daylight.

What is the average length of the day in December in Tucson?

In Tucson, Arizona, the average length of the day in December is 10.1h.

What is the month with the least sunshine in Tucson?

The month with the least sunshine in Tucson is December, with an average of 7h of sunshine.

How long on average sun shines in December in Tucson?

The average sunshine in December in Tucson, Arizona, is 7h.

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

Months with the lowest UV index in Tucson are November and December, with an average maximum UV index of 3.

What is the UV index intensity in December in Tucson?

The average daily maximum UV index in December in Tucson, Arizona, is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Tucson, AZ

Average temperature in December - Tucson, AZ
  • Average high temperature in December: 60.8°F

The warmest month (with the highest average high temperature) is June (96.6°F).
The month with the lowest average high temperature is December (60.8°F).

  • Average low temperature in December: 43°F

The month with the highest average low temperature is July (77°F).
The coldest months (with the lowest average low temperature) are January and December (43°F).

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Average pressure in December
Tucson, AZ

Average pressure in December - Tucson, AZ
  • Average pressure in December: 30.05"

The month with the highest atmospheric pressure is January (30.08").
The month with the lowest atmospheric pressure is June (29.83").

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Average wind speed in December
Tucson, AZ

Average wind speed in December - Tucson, AZ
  • Average wind speed in December: 6.3mph

The windiest months (with the highest average wind speed) are April and May (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in December
Tucson, AZ

Average humidity in December - Tucson, AZ
  • Average humidity in December: 45%

The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (19%).

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Average rainfall in December
Tucson, AZ

Average rainfall in December - Tucson, AZ
  • Average rainfall in December: 0.83"

The wettest month (with the highest rainfall) is July (1.42").
The driest month (with the least rainfall) is May (0.08").

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Average rainfall days in December
Tucson, AZ

Average rainfall days in December - Tucson, AZ
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is May (1.3 days).

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Average snowfall in December
Tucson, AZ

Average snowfall in December - Tucson, AZ
  • Average snowfall in December: 0"

The month with the highest snowfall is January (0.08").
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Tucson, AZ

Average snowfall days in December - Tucson, AZ
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.2 days).
Months with the least snowfall days are February, 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
Tucson, AZ

Average daylight in December / Average sunshine in December - Tucson, AZ
  • Average daylight in December: 10.1h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in December: 7h

The month with the most sunshine is August (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 7h).

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Average sunshine days in December
Tucson, AZ

Average sunshine days in December - Tucson, AZ
  • Average sunshine days in December: 23.9 days

The month with the most sunshine days is May (29.3 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in December
Tucson, AZ

Average UV index in December - Tucson, AZ
  • Average UV index in December: 3

The month with the highest UV index is June (UV index 8).
Months with the lowest UV index are November and December (UV index 3).

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Average cloud cover in December
Tucson, AZ

Average cloud cover in December - Tucson, AZ
  • Average cloud cover in December: 19

The month with the most cloud cover is December (Cloud cover 19).
Months with the least cloud cover are May and June (Cloud cover 7).

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Average visibility in December
Tucson, AZ

Average visibility in December - Tucson, AZ
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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