December weather forecast
Chappaqua, NY

Share

Weather in December

December, the first month of the winter in Chappaqua, is also an icy month, with an average temperature ranging between min 30.2°F (-1°C) and max 40.1°F (4.5°C).

Temperature

In Chappaqua, entering December brings a temperature decrement, reducing from November's cool 50°F (10°C) to a cold 40.1°F (4.5°C). Chappaqua records an average temperature drop to a subzero cold 30.2°F (-1°C) in December.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Chappaqua, during December, the rain falls for 10 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, there are 144.2 rainfall days, and 22.32" (567mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Chappaqua, during December, snow falls for 4.3 days and regularly aggregates up to 1.65" (42mm) of snow. In Chappaqua, New York, during the entire year, snow falls for 23.1 days and aggregates up to 9.02" (229mm) of snow.

Daylight

December has the shortest days of the year in Chappaqua, 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 7:20 am and sunset at 4:36 pm EST.

Sunshine

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

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 2 during December translates into the following guidance:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.

Frequently asked questions

Is December cold?

The high-temperature, in December, in Chappaqua, is 40.1°F (4.5°C), while the low-temperature averages to 30.2°F (-1°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 86°F (30°C).

What is the average humidity in December?

In Chappaqua, the average relative humidity in December is 77%.

How much does it rain in December?

In December, the rain falls for 10 days. Throughout December, 2.28" (58mm) of precipitation is accumulated.

How much does it snow in December?

In December, it is snowing for 4.3 days. Throughout December, 1.65" (42mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, 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 16min.

When is the sunrise / 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 long on average sun shines 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.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from 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
Chappaqua, NY

Average temperature in December - Chappaqua, NY
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

Average pressure in December
Chappaqua, NY

Average pressure in December - Chappaqua, 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
Chappaqua, NY

Average wind speed in December - Chappaqua, NY
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Chappaqua, NY

Average humidity in December - Chappaqua, NY
  • Average humidity in December: 77%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Chappaqua, NY

Average rainfall in December - Chappaqua, NY
  • Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is February (1.18").

Average rainfall days in December
Chappaqua, NY

Average rainfall days in December - Chappaqua, NY
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).

Average snowfall in December
Chappaqua, NY

Average snowfall in December - Chappaqua, NY
  • Average snowfall in December: 1.65"

The month with the highest snowfall is March (2.95").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Chappaqua, NY

Average snowfall days in December - Chappaqua, NY
  • Average snowfall days in December: 4.3 days

The month with the highest number of snowfall days is February (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
Chappaqua, NY

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

Average sunshine days in December - Chappaqua, NY
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is June (12.1 days).

Average UV index in December
Chappaqua, NY

Average UV index in December - Chappaqua, 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
Chappaqua, NY

Average cloud cover in December - Chappaqua, NY
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in December
Chappaqua, NY

Average visibility in December - Chappaqua, 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).

Chappaqua, New York, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location