December weather forecast and climate
Fort Sumner, NM

The first month of the winter, December, is also a frosty month in Fort Sumner, New Mexico, with average temperature varying between 31.5°F (-0.3°C) and 49.3°F (9.6°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 December, in Fort Sumner, the rain falls for 3.2 days. Throughout December, 0.51" (13mm) of precipitation is accumulated. In Fort Sumner, New Mexico, during the entire year, the rain falls for 78.6 days and collects up to 9.06" (230mm) of precipitation.

Snowfall

Months with snowfall in Fort Sumner are January through April, October through December. In Fort Sumner, during December, snow falls for 3.5 days and regularly aggregates up to 1.65" (42mm) of snow. In Fort Sumner, during the entire year, snow falls for 13.6 days, and aggregates up to 8.19" (208mm) of snow.

Daylight

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

Sunshine

Months with the least sunshine 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 of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. 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 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 in Fort Sumner.

What is the temperature in December in Fort Sumner?

In December, in Fort Sumner, the average high-temperature is 49.3°F (9.6°C), and the average low-temperature is 31.5°F (-0.3°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 Fort Sumner, New Mexico, the average relative humidity in December is 52%.

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

In Fort Sumner, in December, during 3.2 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

How much does it snow in Fort Sumner in December?

In Fort Sumner, New Mexico, in December, snow falls for 3.5 days, with typically accumulated 1.65" (42mm) of snow.

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

December has the shortest days of the year in Fort Sumner, with an average of 9.9h of daylight.

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

In December, the average length of the day in Fort Sumner is 9.9h.

What is the month with the least sunshine in Fort Sumner?

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

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

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

When is the lowest UV index in Fort Sumner?

December is the month with the lowest UV index in Fort Sumner, New Mexico, with an average maximum UV index of 2.

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

In Fort Sumner, New Mexico, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to the UV radiation.
Average temperature in December - Fort Sumner, NM
  • Average high temperature in December: 9.6°C

The warmest months (with the highest average high temperature) are June and July (32.2°C).
The month with the lowest average high temperature is December (9.6°C).

  • Average low temperature in December: -0.3°C

The month with the highest average low temperature is July (20.5°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).

Average pressure in December - Fort Sumner, NM
  • Average pressure in December: 1018.9mbar

The month with the highest atmospheric pressure is January (1020mbar).
The month with the lowest atmospheric pressure is April (1011.3mbar).

Average wind speed in December - Fort Sumner, NM
  • Average wind speed in December: 18.9km/h

The windiest month (with the highest average wind speed) is April (20.8km/h).
The calmest month (with the lowest average wind speed) is August (14.5km/h).

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%).

Average rainfall in December - Fort Sumner, NM
  • Average rainfall in December: 13mm

The wettest month (with the highest rainfall) is July (41mm).
The driest month (with the least rainfall) is January (9mm).

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).

Average snowfall in December - Fort Sumner, NM
  • Average snowfall in December: 42mm

The month with the highest snowfall is November (47mm).
Months with the least snowfall are May, June, July, August and September (0mm).

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

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

Average daylight in December / Average sunshine in December - Fort Sumner, NM
  • 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: 7.1h

The month with the most sunshine is June (Average sunshine: 11.9h).
Months with the least sunshine are January and December (Average sunshine: 7.1).

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).

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).

Average visibility in December - Fort Sumner, NM
  • Average visibility in December: 10km

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