December weather forecast
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

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

Temperature

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

Humidity

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

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

With an average of 10h and 5min of daylight, December has the shortest days of the year.
On the first day of December in Tucson, sunrise is at 7:06 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:28 pm MST.

Sunshine

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

UV index

The months with the lowest UV index in Tucson are November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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?

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

What is the temperature in December in Tucson?

In Tucson, Arizona, in December, the average high-temperature is 60.8°F (16°C), and the average low-temperature is 43°F (6.1°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is estimated at 89.6°F (32°C).

What is the most humid month in Tucson?

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

What is the average humidity in December in Tucson?

The average relative humidity in December in Tucson is 45%.

How many days does it rain in December in Tucson?

In December, the rain falls for 6.2 days. Throughout December, 0.83" (21mm) of precipitation is accumulated.

When it does not snow in Tucson?

February through December are months without snowfall.

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?

December has the shortest days of the year in Tucson, Arizona, with an average of 10h and 5min of daylight.

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

In December, the average day length is 10h and 5min.

When are sunrise and sunset in December in Tucson?

On the first day of December, sunrise is at 7:06 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:28 pm MST.

What is the month with the least sunshine in Tucson?

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

How long on average sun shines in December in Tucson?

In Tucson, Arizona, the average sunshine duration in December is 7h.

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

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

How high is the UV index in December in Tucson?

The average daily maximum UV index in December in Tucson is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"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 - 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").
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 - 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 / Average sunshine in December - Tucson, AZ
  • Average daylight in December: 10h and 5min

The month with the longest days is June (Average daylight: 14h and 14min).
The month with the shortest days is December (Average daylight: 10h and 5min).

  • 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 - 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).
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 - 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 - 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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