December weather forecast
Purchase, NY

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Weather in December

December, the first month of the winter in Purchase, is also an icy month, with an average temperature ranging between max 41.5°F (5.3°C) and min 31.8°F (-0.1°C).

Temperature

Purchase's December weather features a mild decline in high-temperatures, reducing from a fresh 50.5°F (10.3°C) in November to an icy 41.5°F (5.3°C). During the month of December, the temperature falls to an average of 31.8°F (-0.1°C).

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 Purchase, in December, snow falls for 4.7 days, with typically accumulated 2.32" (59mm) of snow. Throughout the year, there are 27.1 snowfall days, and 13.07" (332mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:36 pm EST.

Sunshine

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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 2 translates into these guidelines:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Updated: Jun 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In Purchase, 41.5°F (5.3°C) is the average high-temperature and 31.8°F (-0.1°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is computed to be 84.2°F (29°C).

What is the most humid month in Purchase?

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

What is the average humidity in December?

The average relative humidity in December is 76%.

What is the wettest 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 Purchase, in December, during 12 rainfall days, 3.98" (101mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Purchase, during December, snow falls for 4.7 days and regularly aggregates up to 2.32" (59mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

The average day length in December is 9h and 17min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:36 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 4.9h.

When is the lowest UV index?

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

What is the UV index reading in December in Purchase?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Purchase, NY

Average temperature in December - Purchase, 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
Purchase, NY

Average pressure in December - Purchase, 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
Purchase, NY

Average wind speed in December - Purchase, 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
Purchase, NY

Average humidity in December - Purchase, 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
Purchase, NY

Average rainfall in December - Purchase, 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
Purchase, NY

Average rainfall days in December - Purchase, 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
Purchase, NY

Average snowfall in December - Purchase, 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
Purchase, NY

Average snowfall days in December - Purchase, 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
Purchase, NY

Average daylight in December / Average sunshine in December - Purchase, 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
Purchase, NY

Average sunshine days in December - Purchase, 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
Purchase, NY

Average UV index in December - Purchase, 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
Purchase, NY

Average cloud cover in December - Purchase, 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
Purchase, NY

Average visibility in December - Purchase, 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).

Purchase, New York, USA

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