December weather forecast
Valhalla, NY

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Weather in December

The first month of the winter, December, is also an icy month in Valhalla, New York, with an average temperature varying between 31.8°F (-0.1°C) and 41.5°F (5.3°C).

Temperature

With December's arrival, Valhalla's weather changes as the average high-temperature falls from a fresh 50.5°F (10.3°C) in November to an icy 41.5°F (5.3°C). Throughout December, an average low-temperature of 31.8°F (-0.1°C) is expected.

Humidity

February and December, with an average relative humidity of 76%, are the most humid months.

Rainfall

December is the month with the most rainfall. Rain falls for 12 days and accumulates 3.98" (101mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In December, it is snowing for 4.7 days. Throughout December, 2.32" (59mm) of snow is accumulated. In Valhalla, during the entire year, snow falls for 27.1 days and aggregates up to 13.07" (332mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:36 pm EST.

Sunshine

In Valhalla, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Updated: Jul 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

In December, in Valhalla, the average high-temperature is 41.5°F (5.3°C), and the average low-temperature is 31.8°F (-0.1°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is appraised at 84.2°F (29°C).

What are the most humid months?

February and December, with an average relative humidity of 76%, are most humid months.

What is the average humidity in December?

The average relative humidity in December is 76%.

What is the rainiest month?

The month with the most rainfall is December, when the rain falls for 12 days and typically aggregates up to 3.98" (101mm) of precipitation.

How much does it rain in December?

In Valhalla, during December, the rain falls for 12 days and regularly aggregates up to 3.98" (101mm) of precipitation.

How many days does it snow in December?

In Valhalla, in December, snow falls for 4.7 days, with typically accumulated 2.32" (59mm) of snow.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

How many hours of daylight does Valhalla have in December?

In Valhalla, the average day length in December is 9h and 17min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:36 pm EST.

How many hours of sunshine does Valhalla have in December?

The average sunshine duration in December is 4.9h.

What are the months with the lowest UV index?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December in Valhalla?

In Valhalla, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat 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
Valhalla, NY

Average temperature in December - Valhalla, NY
  • Average high temperature in December: 41.5°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 31.8°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in December
Valhalla, NY

Average pressure in December - Valhalla, NY
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Valhalla, NY

Average wind speed in December - Valhalla, NY
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average humidity in December
Valhalla, NY

Average humidity in December - Valhalla, NY
  • Average humidity in December: 76%

The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April and August (71%).

Average rainfall in December
Valhalla, NY

Average rainfall in December - Valhalla, NY
  • Average rainfall in December: 3.98"

The wettest month (with the highest rainfall) is December (3.98").
The driest month (with the least rainfall) is September (2.2").

Average rainfall days in December
Valhalla, NY

Average rainfall days in December - Valhalla, NY
  • Average rainfall days in December: 12 days

The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (8.1 days).

Average snowfall in December
Valhalla, NY

Average snowfall in December - Valhalla, NY
  • Average snowfall in December: 2.32"

The month with the highest snowfall is March (3.78").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Valhalla, NY

Average snowfall days in December - Valhalla, NY
  • Average snowfall days in December: 4.7 days

The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Valhalla, NY

Average daylight in December / Average sunshine in December - Valhalla, NY
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Valhalla, NY

Average sunshine days in December - Valhalla, NY
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in December
Valhalla, NY

Average UV index in December - Valhalla, NY
  • 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, March, November and December (UV index 2).

Average cloud cover in December
Valhalla, NY

Average cloud cover in December - Valhalla, NY
  • Average cloud cover in December: 48

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in December
Valhalla, NY

Average visibility in December - Valhalla, NY
  • 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).

Valhalla, New York, USA

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