December weather forecastRuby, AZ

December

Weather in December

The first month of the winter, December, is also a moderate month in Ruby, Arizona, with an average temperature varying between 59.7°F (15.4°C) and 40.5°F (4.7°C).

Temperature

December is Ruby's coldest month, registering average high temperatures of 59.7°F (15.4°C) and lows of 40.5°F (4.7°C).

Humidity

In Ruby, the average relative humidity in December is 47%.

Rainfall

In Ruby, during December, the rain falls for 6 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 89.6 rainfall days, and 15.94" (405mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March and December. December is the month with the most snowfall. Snow falls for 0.9 days and accumulates 1.18" (30mm) of snow.

Daylight

December has the shortest days of the year, with an average of 10h and 6min of daylight.
On the first day of December, sunrise is at 7:06 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:32 pm MST.

Sunshine

With an average of 6.9h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index in Ruby are November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily high UV index of 3 in December translates into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.

Updated: Jul 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Temperature records mark December as the coldest month, with highs averaging 59.7°F (15.4°C) and lows at 40.5°F (4.7°C).

The high-temperature during December is 59.7°F (15.4°C) and the low-temperature is 40.5°F (4.7°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 84.2°F (29°C).

In December, the average relative humidity is 47%.

In Ruby, in December, during 6 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

The month with the most snowfall is December, when snow falls for 0.9 days and typically aggregates up to 1.18" (30mm) of snow.

December is the first month it typically snows. Throughout December, in the average 0.9 snowfall days, it receives 1.18" (30mm) of snow.

With an average of 10h and 6min of daylight, December has the shortest days of the year.

In Ruby, the average day length in December is 10h and 8min.

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:32 pm MST.

The month with the least sunshine is December, with an average of 6.9h of sunshine.

The average sunshine duration in December is 6.9h.

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

In Ruby, 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 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

68.9°F

59.7°F

60.6°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8mph

7.5mph

7.1mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

25.9

24.4

26.2

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Ruby, AZ

Average high temperature in December: 59.7°F

The warmest month (with the highest average high temperature) is June (91.6°F).
The month with the lowest average high temperature is December (59.7°F).

Average low temperature in December: 40.5°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is December (40.5°F).

Average pressure in December
Ruby, AZ

Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).

Average wind speed in December
Ruby, AZ

Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is May (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Ruby, AZ

Average humidity in December: 47%

The month with the highest relative humidity is August (52%).
The months with the lowest relative humidity are May and June (24%).

Average rainfall in December
Ruby, AZ

Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is July (4.41").
The driest month (with the least rainfall) is May (0.12").

Average rainfall days in December
Ruby, AZ

Average rainfall days in December: 6 days

The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is May (1.7 days).

Average snowfall in December
Ruby, AZ

Average snowfall in December: 1.18"

The month with the highest snowfall is December (1.18").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Ruby, AZ

Average snowfall days in December: 0.9 days

The month with the highest number of snowfall days is December (0.9 days).
The months with the least snowfall days are April, May, June, July, August, October and November (0 days).

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

Average daylight in December: 10h and 6min

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: 6h and 54min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).

Average sunshine days in December
Ruby, AZ

Average sunshine days in December: 24.4 days

The month with the most sunshine days is May (29 days).
The month with the least sunshine days is July (6.8 days).

Average UV index in December
Ruby, AZ

Average UV index in December: 3

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are November and December (UV index 3).

Average cloud cover in December
Ruby, AZ

Average cloud cover in December: 21

The month with the most cloud cover is July (Cloud cover 24).
The month with the least cloud cover is May (Cloud cover 7).

Average visibility in December
Ruby, 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).