December weather forecast
Fort Sumner, NM

Weather in December

December, the first month of the winter in Fort Sumner, is still a chilly month, with an average temperature fluctuating between 49.3°F (9.6°C) and 31.5°F (-0.3°C).

Temperature

December is the coldest month, with an average high-temperature of 49.3°F (9.6°C) and an average low-temperature of 31.5°F (-0.3°C).

Humidity

The most humid month is December, with an average relative humidity of 52%.

Rainfall

In Fort Sumner, New Mexico, in December, during 3.2 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, there are 78.6 rainfall days, and 9.06" (230mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Fort Sumner, snow falls for 3.5 days, with typically accumulated 1.65" (42mm) of snow. Throughout the year, there are 13.6 snowfall days, and 8.19" (208mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 53min of daylight.
On the first day of the month, sunrise is at 6:45 am and sunset at 4:46 pm. On the last day of December, in Fort Sumner, sunrise is at 7:03 am and sunset at 4:56 pm MST.

Sunshine

The months with the least sunshine in Fort Sumner are January and December, with an average of 7.1h of sunshine.

UV index

With an average maximum UV index of 2, December is the month with the lowest UV index in Fort Sumner. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Fort Sumner?

With an average high-temperature of 49.3°F (9.6°C) and an average low-temperature of 31.5°F (-0.3°C), December is the coldest month.

What is the temperature in December in Fort Sumner?

In December, the average high-temperature is 49.3°F (9.6°C), and the average low-temperature is 31.5°F (-0.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in September is calculated to be 82.4°F (28°C).

What is the most humid month in Fort Sumner?

With an average relative humidity of 52%, December is the most humid month in Fort Sumner.

What is the average humidity in December in Fort Sumner?

In December, the average relative humidity in Fort Sumner, New Mexico, is 52%.

How many days does it rain in December in Fort Sumner?

In Fort Sumner, during December, the rain falls for 3.2 days and regularly aggregates up to 0.51" (13mm) of precipitation.

How much does it snow in Fort Sumner in December?

In December, in Fort Sumner, New Mexico, it is snowing for 3.5 days. Throughout December, 1.65" (42mm) of snow is accumulated.

What is the month with the shortest days in Fort Sumner?

The month with the shortest days in Fort Sumner is December, with an average of 9h and 53min of daylight.

How many hours of daylight does Fort Sumner have in December?

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

When are sunrise and sunset in December in Fort Sumner?

In December, on the first day of the month, sunrise is at 6:45 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 4:56 pm MST.

What are the months with the least sunshine in Fort Sumner?

The months with the least sunshine are January and December, with an average of 7.1h of sunshine.

How long on average sun shines in December in Fort Sumner?

In Fort Sumner, the average sunshine duration in December is 7.1h.

What is the month with the lowest UV index in Fort Sumner?

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

What is the UV index reading in December in Fort Sumner?

In Fort Sumner, New Mexico, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Fort Sumner, NM

Average temperature in December - Fort Sumner, NM
  • Average high temperature in December: 49.3°F

The warmest months (with the highest average high temperature) are June and July (90°F).
The month with the lowest average high temperature is December (49.3°F).

  • Average low temperature in December: 31.5°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in December
Fort Sumner, NM

Average pressure in December - Fort Sumner, NM
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is April (29.86"Hg).

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Average wind speed in December
Fort Sumner, NM

Average wind speed in December - Fort Sumner, NM
  • Average wind speed in December: 11.7mph

The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (9mph).

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Average humidity in December
Fort Sumner, NM

Average humidity in December - Fort Sumner, NM
  • Average humidity in December: 52%

The month with the highest relative humidity is December (52%).
The month with the lowest relative humidity is April (31%).

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Average rainfall in December
Fort Sumner, NM

Average rainfall in December - Fort Sumner, NM
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is January (0.35").

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Average rainfall days in December
Fort Sumner, NM

Average rainfall days in December - Fort Sumner, NM
  • Average rainfall days in December: 3.2 days

The month with the highest number of rainy days is July (12.5 days).
The month with the least rainy days is November (2.4 days).

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Average snowfall in December
Fort Sumner, NM

Average snowfall in December - Fort Sumner, NM
  • Average snowfall in December: 1.65"

The month with the highest snowfall is November (1.85").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Fort Sumner, NM

Average snowfall days in December - Fort Sumner, NM
  • Average snowfall days in December: 3.5 days

The months with the highest number of snowfall days are January and December (3.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Fort Sumner, NM

Average daylight in December / Average sunshine in December - Fort Sumner, NM
  • Average daylight in December: 9h and 53min

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

  • Average sunshine in December: 7h and 6min

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: 7h and 6min).

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Average sunshine days in December
Fort Sumner, NM

Average sunshine days in December - Fort Sumner, NM
  • Average sunshine days in December: 24.6 days

The month with the most sunshine days is November (25.5 days).
The month with the least sunshine days is July (14 days).

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Average UV index in December
Fort Sumner, NM

Average UV index in December - Fort Sumner, NM
  • Average UV index in December: 2

The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in December
Fort Sumner, NM

Average cloud cover in December - Fort Sumner, NM
  • Average cloud cover in December: 19

The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 12).

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Average visibility in December
Fort Sumner, NM

Average visibility in December - Fort Sumner, NM
  • 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).

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