December weather forecast
Signal, AZ

Weather in December

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

Temperature

With an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 38.5°F (3.6°C), December is the coldest month.

Humidity

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

Rainfall

In Signal, Arizona, in December, during 5.6 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. In Signal, Arizona, 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, in Signal, Arizona, it is snowing for 0.6 days. Throughout December, 0.43" (11mm) of snow is accumulated. Throughout the year, in Signal, there are 2.8 snowfall days, and 3.74" (95mm) of snow is accumulated.

Daylight

With an average of 9.9h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

December is the month with the lowest UV index in Signal, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Signal?

With an average high-temperature of 54.5°F (12.5°C) and an average low-temperature of 38.5°F (3.6°C), December is the coldest month in Signal.

What is the most humid month in Signal?

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

What is the average humidity in December in Signal?

In December, the average relative humidity in Signal is 48%.

How many days does it rain in December in Signal?

In Signal, in December, it is raining for 5.6 days, with typically 0.75" (19mm) of accumulated precipitation.

How many days does it snow in December in Signal?

In Signal, in December, snow falls for 0.6 days, with typically accumulated 0.43" (11mm) of snow.

What is the month with the shortest days in Signal?

With an average of 9.9h of daylight, December has the shortest days of the year in Signal.

How many hours of daylight does Signal have in December?

In Signal, Arizona, the average length of the day in December is 9.9h.

What is the month with the least sunshine in Signal?

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

How many hours of sunshine does Signal have in December?

In Signal, Arizona, the average sunshine in December is 6.9h.

When is the lowest UV index in Signal?

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

How high is the UV index in December in Signal?

The average daily maximum UV index in December in Signal is 2. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV radiation.

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).

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Average pressure in December
Signal, AZ

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

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

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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).

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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%).

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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").

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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).

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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").
Months with the least snowfall are May, June, July, August, September and October (0").

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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).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Signal, AZ
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 6.9h

The month with the most sunshine is June (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days in December
Signal, AZ

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

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).

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Average UV index in December
Signal, AZ

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

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).

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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).

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Average visibility in December
Signal, AZ

Average visibility in December - Signal, AZ
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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