December weather forecast and climate
Roy, NM

The first month of the winter, December, is still a cold month in Roy, New Mexico, with average temperature ranging between min 23.9°F (-4.5°C) and max 42.1°F (5.6°C).

Temperature

The coldest month is December, with an average high-temperature of 42.1°F (5.6°C) and an average low-temperature of 23.9°F (-4.5°C).

Humidity

January and December, with an average relative humidity of 61%, are most humid months in Roy.

Rainfall

In Roy, during December, the rain falls for 4.3 days and regularly aggregates up to 0.63" (16mm) of precipitation. In Roy, during the entire year, the rain falls for 76.1 days and collects up to 9.17" (233mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Roy, in December, during 7.9 snowfall days, 4.8" (122mm) of snow is typically accumulated. Throughout the year, in Roy, New Mexico, there are 34.6 snowfall days, and 21.57" (548mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.8h of daylight.

Sunshine

In Roy, the average sunshine is 7.1h.

UV index

Months with the lowest UV index in Roy, New Mexico, are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the coldest month in Roy?

December is the coldest month in Roy, New Mexico, with an average high-temperature of 42.1°F (5.6°C) and an average low-temperature of 23.9°F (-4.5°C).

What is the temperature in December in Roy?

The average high-temperature, in December, in Roy, is 42.1°F (5.6°C), while the average low-temperature is 23.9°F (-4.5°C).

What are the most humid months in Roy?

Months with the highest humidity in Roy, New Mexico, are January and December, with an average relative humidity of 61%.

What is the average humidity in December in Roy?

In December, the average relative humidity in Roy, New Mexico, is 61%.

How much does it rain in Roy in December?

In December, the rain falls for 4.3 days. Throughout December, 0.63" (16mm) of precipitation is accumulated.

How many days does it snow in December in Roy?

In Roy, in December, during 7.9 snowfall days, 4.8" (122mm) of snow is typically accumulated.

What is the month with the shortest days in Roy?

December has the shortest days of the year in Roy, with an average of 9.8h of daylight.

How many hours of daylight does Roy have in December?

The average length of the day in December in Roy is 9.8h.

How many hours of sunshine does Roy have in December?

In Roy, the average sunshine in December is 7.1h.

When is the lowest UV index in Roy?

Months with the lowest UV index in Roy are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Roy?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Roy, NM
  • Average high temperature in December: 5.6°C

The warmest month (with the highest average high temperature) is July (27.5°C).
The month with the lowest average high temperature is December (5.6°C).

  • Average low temperature in December: -4.5°C

The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is December (-4.5°C).

Average pressure in December - Roy, NM
  • Average pressure in December: 1019.1mbar

The month with the highest atmospheric pressure is January (1020.4mbar).
The month with the lowest atmospheric pressure is April (1011.6mbar).

Average wind speed in December - Roy, NM
  • Average wind speed in December: 15.3km/h

The windiest month (with the highest average wind speed) is April (17.6km/h).
The calmest month (with the lowest average wind speed) is August (11.5km/h).

Average humidity in December - Roy, NM
  • Average humidity in December: 61%

Months with the highest relative humidity are January and December (61%).
Months with the lowest relative humidity are April and June (37%).

Average rainfall in December - Roy, NM
  • Average rainfall in December: 16mm

The wettest month (with the highest rainfall) is July (42mm).
The driest month (with the least rainfall) is November (12mm).

Average rainfall days in December - Roy, NM
  • Average rainfall days in December: 4.3 days

The month with the highest number of rainy days is July (11.5 days).
The month with the least rainy days is November (2.6 days).

Average snowfall in December - Roy, NM
  • Average snowfall in December: 122mm

The month with the highest snowfall is January (128mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Roy, NM
  • Average snowfall days in December: 7.9 days

The month with the highest number of snowfall days is December (7.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Roy, NM
  • Average daylight in December: 9.8h

The month with the longest days is June (Average daylight: 14.6h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in December: 7.1h

The month with the most sunshine is June (Average sunshine: 11.9h).
Months with the least sunshine are January and February (Average sunshine: 7).

Average sunshine days in December - Roy, NM
  • Average sunshine days in December: 21.8 days

The month with the most sunshine days is November (24.6 days).
The month with the least sunshine days is July (17.3 days).

Average UV index in December - Roy, NM
  • Average UV index in December: 2

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility in December - Roy, NM
  • Average visibility in December: 10km

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January and February (9km).