December weather forecast
Gallup, NM

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Weather in December

December marks the arrival of winter in its full force in Gallup, with the city experiencing temperatures dipping as low as 22.6°F (-5.2°C). Both daylight and sunshine hours reach the low ebb of the year. Consequently, snowfall occurrence surges dramatically, making December the most snowy month. To conclude, the weather scenario in Gallup undergoes massive shifts throughout the year, influenced by various climatic factors.

Temperature

Gallup's average high-temperature decreases in December, falling from a cool 51.4°F (10.8°C) in November to a wintry 40.1°F (4.5°C). In Gallup, an average temperature of 22.6°F (-5.2°C) is noted during December nights.

Humidity

In December, the average relative humidity is 66%.

Rainfall

In Gallup, in December, during 3.7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Gallup, New Mexico, during the entire year, the rain falls for 69.2 days and collects up to 6.69" (170mm) of precipitation.

Snowfall

Months with snowfall in Gallup are January through May, October through December. In Gallup, New Mexico, in December, during 5.9 snowfall days, 2.6" (66mm) of snow is typically accumulated. Throughout the year, in Gallup, New Mexico, there are 24.1 snowfall days, and 10.91" (277mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Gallup, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 7:06 am and sunset at 5:02 pm. On the last day of December, sunrise is at 7:24 am and sunset at 5:12 pm MST.

Sunshine

January and December, with an average of 6.5h of sunshine, are months with the least sunshine in Gallup.

UV index

The months with the lowest UV index in Gallup are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 2 in December suggests the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold in Gallup?

During December, Gallup experiences an average high-temperature of 40.1°F (4.5°C) and a low-temperature of 22.6°F (-5.2°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is evaluated at 80.6°F (27°C).

What is the average humidity in December in Gallup?

In Gallup, New Mexico, the average relative humidity in December is 66%.

How many days does it rain in December in Gallup?

In December, the rain falls for 3.7 days. Throughout December, 0.55" (14mm) of precipitation is accumulated.

How much does it snow in Gallup in December?

In Gallup, New Mexico, in December, snow falls for 5.9 days, with typically accumulated 2.6" (66mm) of snow.

What is the month with the shortest days in Gallup?

With an average of 9h and 48min of daylight, December has the shortest days of the year in Gallup.

How many hours of daylight does Gallup have in December?

In December, the average day length is 9h and 48min.

What time are sunrise and sunset in December in Gallup?

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:12 pm MST.

What are the months with the least sunshine in Gallup?

The months with the least sunshine in Gallup are January and December, with an average of 6.5h of sunshine.

How long on average sun shines in December in Gallup?

The average sunshine duration in December in Gallup is 6.5h.

When is the lowest UV index in Gallup?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Gallup, New Mexico.

How high is the UV index in December in Gallup?

In Gallup, the average daily maximum UV index in December is 2. A UV Index reading 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
Gallup, NM

Average temperature in December - Gallup, NM
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in December: 22.6°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

Average pressure in December
Gallup, NM

Average pressure in December - Gallup, NM
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in December
Gallup, NM

Average wind speed in December - Gallup, NM
  • Average wind speed in December: 7.7mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is January (6.8mph).

Average humidity in December
Gallup, NM

Average humidity in December - Gallup, NM
  • Average humidity in December: 66%

The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is June (23%).

Average rainfall in December
Gallup, NM

Average rainfall in December - Gallup, NM
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is July (1.06").
The driest months (with the least rainfall) are May and June (0.24").

Average rainfall days in December
Gallup, NM

Average rainfall days in December - Gallup, NM
  • Average rainfall days in December: 3.7 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is February (2.6 days).

Average snowfall in December
Gallup, NM

Average snowfall in December - Gallup, NM
  • Average snowfall in December: 2.6"

The month with the highest snowfall is January (2.91").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Gallup, NM

Average snowfall days in December - Gallup, NM
  • Average snowfall days in December: 5.9 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Gallup, NM

Average daylight in December / Average sunshine in December - Gallup, NM
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in December: 6h and 3min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 30min).

Average sunshine days in December
Gallup, NM

Average sunshine days in December - Gallup, NM
  • Average sunshine days in December: 22.4 days

The month with the most sunshine days is June (25.1 days).
The month with the least sunshine days is July (14.4 days).

Average UV index in December
Gallup, NM

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Gallup, NM

Average cloud cover in December - Gallup, NM
  • Average cloud cover in December: 27

The month with the most cloud cover is January (Cloud cover 28).
The month with the least cloud cover is June (Cloud cover 10).

Average visibility in December
Gallup, NM

Average visibility in December - Gallup, NM
  • Average visibility in December: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Gallup, New Mexico, USA

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