Sierra Vista
Arizona, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Sierra Vista, AZ

The vast Sierra Vista region of Arizona, and a view of a local church and distant mountain ranges
The vast Sierra Vista region of Arizona, and a view of a local church and distant mountain ranges
December, the first month of the winter, in Sierra Vista, is still a comfortable month, with average temperature ranging between min 34°F (1.1°C) and max 61.5°F (16.4°C).

Temperature

In Sierra Vista, Arizona, the average high-temperature slightly decreases, from an agreeable 69.4°F (20.8°C) in November, to a comfortable 61.5°F (16.4°C). In December, in Sierra Vista, the average low-temperature is 34°F (1.1°C).

Rainfall

In December, the rain falls for 4 days. Throughout December, 1" (26mm) of precipitation is accumulated. Throughout the year, in Sierra Vista, there are 52 rainfall days, and 13.9" (352mm) of precipitation is accumulated.

Snowfall

January through March and December are months with snowfall.

Daylight

With an average of 10.1h of daylight, December has the shortest days of the year in Sierra Vista.

Sunshine

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

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index in Sierra Vista. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Sierra Vista?

In December, the average high-temperature is 61.5°F (16.4°C), and the average low-temperature is 34°F (1.1°C).

How many days does it rain in December in Sierra Vista?

In Sierra Vista, in December, during 4 rainfall days, 1" (26mm) of precipitation is typically accumulated.

When does it start to snow in Sierra Vista?

December is the first month it typically snows. Throughout December, Sierra Vista receives 0.1" (2.5mm) of snow.

What is the month with the shortest days in Sierra Vista?

With an average of 10.1h of daylight, December has the shortest days of the year in Sierra Vista.

What is the average length of the day in December in Sierra Vista?

In Sierra Vista, the average length of the day in December is 10.1h.

What is the month with the least sunshine in Sierra Vista?

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

How many hours of sunshine does Sierra Vista have in December?

The average sunshine in December in Sierra Vista is 7h.

What is the month with the lowest UV index in Sierra Vista?

The month with the lowest UV index in Sierra Vista is December, with an average maximum UV index of 3.

What is the UV index intensity in December in Sierra Vista?

In Sierra Vista, Arizona, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in December - Sierra Vista, AZ
  • Average high temperature in December: 61.6°F

The warmest month (with the highest average high temperature) is June (92.9°F).
The month with the lowest average high temperature is January (61.2°F).

  • Average low temperature in December: 33.9°F

The month with the highest average low temperature is July (66.3°F).
The coldest month (with the lowest average low temperature) is December (33.9°F).

Average rainfall in December - Sierra Vista, AZ
  • Average rainfall in December: 1"

The wettest month (with the highest rainfall) is July (3.8").
The driest month (with the lowest rainfall) is May (0.1").

Average rainfall days in December - Sierra Vista, AZ
  • Average rainfall days in December: 4 days

The month with the highest number of rainy days is August (12 days).
The month with the lowest number of rainy days is May (1 days).

Average snowfall in December - Sierra Vista, AZ
  • Average snowfall in December: 0.1"

The month with the highest snowfall is January (0.3").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

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

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

  • Average sunshine in December: 7h

Months with most sunshine are May and June (Average sunshine: 12h).
The month with least sunshine is December (Average sunshine: 7h).

Average UV index in December - Sierra Vista, AZ
  • Average UV index in December: 3

The month with the highest UV index is July (UV index 12).
The month with the lowest UV index is December (UV index 3).