December weather forecast
Signal, AZ

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Weather in December

The first month of the winter, December, is also a fresh month in Signal, Arizona, with an average temperature ranging between max 54.5°F (12.5°C) and min 38.5°F (3.6°C).

Temperature

December is the month when Signal, Arizona, experiences its coldest temperatures, averaging a high of 54.5°F (12.5°C) and a low of 38.5°F (3.6°C).

Humidity

The most humid month is December, with an average relative humidity of 48%.

Rainfall

In Signal, Arizona, in December, during 5.6 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Signal, during the entire year, the rain falls for 61.4 days and collects up to 8.35" (212mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 0.6 days. Throughout December, 0.43" (11mm) of snow is accumulated. Throughout the year, there are 2.8 snowfall days, and 3.74" (95mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 7:23 am and sunset at 5:24 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:34 pm MST.

Sunshine

December has the least sunshine of the year in Signal, with an average of 6.9h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

In Signal, December is known for its average lowest temperatures, reaching a high of 54.5°F (12.5°C) and a low of 38.5°F (3.6°C).

What is the temperature in December?

In December, in Signal, the average high-temperature is 54.5°F (12.5°C), and the average low-temperature is 38.5°F (3.6°C).

What is the most humid month?

December is the most humid month, with an average relative humidity of 48%.

What is the average humidity in December in Signal?

The average relative humidity in December is 48%.

How many days does it rain in December?

In Signal, during December, the rain falls for 5.6 days and regularly aggregates up to 0.75" (19mm) of precipitation.

How much does it snow in December?

In December, it is snowing for 0.6 days. Throughout December, 0.43" (11mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 54min of daylight.

What is the average length of the day in December?

In Signal, the average day length in December is 9h and 53min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:23 am and sunset at 5:24 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:34 pm MST.

What is the month with the least sunshine?

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

How long on average sun shines in December?

The average sunshine duration in December is 6.9h.

What is the month with the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 2.

What is the UV index intensity in December?

In Signal, Arizona, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Signal, AZ

Average temperature in December - Signal, AZ
  • Average high temperature in December: 54.5°F

The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in December: 38.5°F

The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is December (38.5°F).

Average pressure in December
Signal, AZ

Average pressure in December - Signal, AZ
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.79"Hg).

Average wind speed in December
Signal, AZ

Average wind speed in December - Signal, AZ
  • Average wind speed in December: 6.1mph

The windiest months (with the highest average wind speed) are April and May (8.3mph).
The calmest month (with the lowest average wind speed) is December (6.1mph).

Average humidity in December
Signal, AZ

Average humidity in December - Signal, AZ
  • Average humidity in December: 48%

The month with the highest relative humidity is December (48%).
The month with the lowest relative humidity is June (19%).

Average rainfall in December
Signal, AZ

Average rainfall in December - Signal, AZ
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is August (1.1").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in December
Signal, AZ

Average rainfall days in December - Signal, AZ
  • Average rainfall days in December: 5.6 days

The month with the highest number of rainy days is July (10.4 days).
The month with the least rainy days is June (1.2 days).

Average snowfall in December
Signal, AZ

Average snowfall in December - Signal, AZ
  • Average snowfall in December: 0.43"

The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Signal, AZ

Average snowfall days in December - Signal, AZ
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Signal, AZ
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 6h and 5min

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

Average sunshine days in December
Signal, AZ

Average sunshine days in December - Signal, AZ
  • Average sunshine days in December: 24 days

The months with the most sunshine days are May and June (28.1 days).
The month with the least sunshine days is August (15.4 days).

Average UV index in December
Signal, AZ

Average UV index in December - Signal, AZ
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in December
Signal, AZ

Average cloud cover in December - Signal, 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
Signal, AZ

Average visibility in December - Signal, 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).

Signal, Arizona, USA

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