December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

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

Weather in December

December in Tucson brings a festive chill to the cityscape, maintaining a balanced, desert winter atmosphere. A sacrosanct harmony between the cool temperatures and comfortable humidity marks the city's weather. The transition between December and January unveils a subtle change, considering the steady winter climate in Tucson. The increased relative humidity, coupled with shorter daylight hours, makes for a picturesque southwestern winter. The winter month ends on a colder note, with temperatures dropping to a low 43°F (6.1°C) just as it does in the first month of the year.

Temperature

December stands out as Tucson's coldest month, with an average high-temperature of 60.8°F (16°C) and a low-temperature of 43°F (6.1°C).

Humidity

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

Rainfall

In December, the rain falls for 6.2 days. Throughout December, 0.83" (21mm) of precipitation is accumulated. In Tucson, during the entire year, the rain falls for 66.1 days and collects up to 7.95" (202mm) of precipitation.

Snowfall

In Tucson, snow does not fall in February through December.

Daylight

December has the shortest days of the year, with an average of 10h and 6min of daylight.
On the first day of December in Tucson, sunrise is at 7:07 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:29 pm MST.

Sunshine

With an average of 7h of sunshine, December has the least sunshine of the year in Tucson.

UV index

The months with the lowest UV index are November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 3 during December translates into the following guidance:
Take necessary precautions - Protection from skin and eye injury is mandatory. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.

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Frequently asked questions

What part of the year is the coldest in Tucson?

Tucson experiences its lowest temperatures in December, with an average peak of 60.8°F (16°C) and a low of 43°F (6.1°C).

What is the usual temperature for Tucson in December?

The average high-temperature and low-temperature in Tucson, Arizona, during December are 60.8°F (16°C) and 43°F (6.1°C) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in September is calculated to be 89.6°F (32°C).

What is the most humid month in Tucson?

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

What is the average humidity in December in Tucson?

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

How much does it rain in Tucson in December?

In Tucson, in December, it is raining for 6.2 days, with typically 0.83" (21mm) of accumulated precipitation.

When it does not snow in Tucson?

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

Does it snow in Tucson in December?

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

What is the month with the shortest days in Tucson?

The month with the shortest days in Tucson, Arizona, is December, with an average of 10h and 6min of daylight.

How many hours of daylight does Tucson have in December?

The average day length in December in Tucson is 10h and 5min.

What time are sunrise and sunset in December in Tucson?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 5:18 pm. On the last day of the month, in Tucson, sunrise is at 7:24 am and sunset at 5:29 pm MST.

What is the month with the least sunshine in Tucson?

December has the least sunshine of the year in Tucson, Arizona, with an average of 7h of sunshine.

How many hours of sunshine does Tucson have in December?

The average sunshine duration in December in Tucson is 7h.

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

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

What is the UV index reading in December in Tucson?

The average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

70.9°F 21.6°C

60.8°F 16°C

61.7°F 16.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.4mph 11.9km/h

7mph 11.3km/h

6.6mph 10.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

25.5

23.9

26.1

Average UV index

Average cloud cover

Average visibility

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: 30.05"Hg

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

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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: 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: 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: 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: 0"

The month with the highest snowfall is January (0.08").
The 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: 0 days

The month with the highest number of snowfall days is January (0.2 days).
The 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: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

Average sunshine in December: 7h and 0min

The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

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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: 3

The month with the highest UV index is June (UV index 8).
The 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: 19

The month with the most cloud cover is December (Cloud cover 19).
The 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: 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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December weather forecast
Tucson, AZ

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