December weather forecast
Scottsdale, AZ

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A scenic waterfront canal running through Scottsdale, Arizona
A scenic waterfront canal running through Scottsdale, Arizona

Weather in December

December ends the year in Scottsdale, Arizona with a return to winter-like conditions, marked by temperatures dipping to an average low of 47.3°F (8.5°C). The high relative humidity of 44% doesn't translate into significant precipitation, leaving the month relatively dry. As the city sees the least amount of daily sunshine hours, early evenings become a norm. With wind speeds dropping to their lowest of 4.4mph (7.1km/h), nippy winds are a rarity. Despite the winter chill, clear visibility and low rainfall make it ideal for festive outdoor activities.

Temperature

In Scottsdale, the lowest average temperatures are observed in December, with a high of 62.8°F (17.1°C) and a low of 47.3°F (8.5°C).

Humidity

The most humid month in Scottsdale is December, with an average relative humidity of 44%.

Rainfall

In Scottsdale, Arizona, in December, during 6.5 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, there are 57.7 rainfall days, and 7.72" (196mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of the month, sunrise is at 7:14 am and sunset at 5:19 pm. On the last day of December, in Scottsdale, sunrise is at 7:31 am and sunset at 5:30 pm MST.

Sunshine

With an average of 6.8h of sunshine, December has the least sunshine of the year in Scottsdale.

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index in Scottsdale. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, an average UV index of 3 transforms into the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

Frequently asked questions

What is the coldest month in Scottsdale?

December, marked by an average high-temperature of 62.8°F (17.1°C) and a low-temperature of 47.3°F (8.5°C), is the coldest month in Scottsdale.

What are December temperatures in Scottsdale?

The high-temperature, in December, in Scottsdale, records 62.8°F (17.1°C), while the low-temperature is 47.3°F (8.5°C).

What is the most humid month in Scottsdale?

With an average relative humidity of 44%, December is the most humid month in Scottsdale, Arizona.

What is the average humidity in December in Scottsdale?

In Scottsdale, Arizona, the average relative humidity in December is 44%.

How many days does it rain in December in Scottsdale?

In Scottsdale, Arizona, during December, the rain falls for 6.5 days and regularly aggregates up to 0.87" (22mm) of precipitation.

What is the month with the shortest days in Scottsdale?

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

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

In Scottsdale, the average day length in December is 9h and 59min.

When are sunrise and sunset in December in Scottsdale?

On the first day of December in Scottsdale, sunrise is at 7:14 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 5:30 pm MST.

What is the month with the least sunshine in Scottsdale?

December has the least sunshine of the year, with an average of 6.8h of sunshine.

How long on average sun shines in December in Scottsdale?

The average sunshine duration in December in Scottsdale, Arizona, is 6.8h.

When is the lowest UV index in Scottsdale?

December is the month with the lowest UV index in Scottsdale, Arizona, with an average maximum UV index of 3.

What is the UV index reading in December in Scottsdale?

The average daily maximum UV index in December in Scottsdale, Arizona, is 3. A UV Index estimate of 3 to 5 represents 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
Scottsdale, AZ

Average temperature in December - Scottsdale, AZ
  • Average high temperature in December: 62.8°F

The warmest month (with the highest average high temperature) is July (102.6°F).
The month with the lowest average high temperature is December (62.8°F).

  • Average low temperature in December: 47.3°F

The month with the highest average low temperature is August (84.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).

Average pressure in December
Scottsdale, AZ

Average pressure in December - Scottsdale, AZ
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).

Average wind speed in December
Scottsdale, AZ

Average wind speed in December - Scottsdale, AZ
  • Average wind speed in December: 4.4mph

The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).

Average humidity in December
Scottsdale, AZ

Average humidity in December - Scottsdale, AZ
  • Average humidity in December: 44%

The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (16%).

Average rainfall in December
Scottsdale, AZ

Average rainfall in December - Scottsdale, AZ
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is July (1.14").
The driest month (with the least rainfall) is June (0.08").

Average rainfall days in December
Scottsdale, AZ

Average rainfall days in December - Scottsdale, AZ
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is June (1 days).

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

Average daylight in December / Average sunshine in December - Scottsdale, 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: 6h and 5min

The months with the most sunshine are June and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

Average sunshine days in December
Scottsdale, AZ

Average sunshine days in December - Scottsdale, AZ
  • Average sunshine days in December: 24.1 days

The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (16.8 days).

Average UV index in December
Scottsdale, AZ

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

The months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in December
Scottsdale, AZ

Average cloud cover in December - Scottsdale, AZ
  • Average cloud cover in December: 21

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).

Average visibility in December
Scottsdale, AZ

Average visibility in December - Scottsdale, 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).

Scottsdale, Arizona, USA

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