December weather forecast
Larchmont, NY

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Weather in December

December, the first month of the winter in Larchmont, is also an icy month, with an average temperature varying between 41.9°F (5.5°C) and 32.9°F (0.5°C).

Temperature

As November transitions into December, Larchmont sees a drop in the average high-temperature, transitioning from a cool 50.9°F (10.5°C) to a cold 41.9°F (5.5°C). Larchmont's nighttime temperature in December consistently rests at a still wintry 32.9°F (0.5°C).

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 75%.

Rainfall

In Larchmont, in December, it is raining for 11.6 days, with typically 2.95" (75mm) of accumulated precipitation. Throughout the year, there are 150.3 rainfall days, and 27.72" (704mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Larchmont, in December, during 2.5 snowfall days, 1.5" (38mm) of snow is typically accumulated. In Larchmont, during the entire year, snow falls for 18.1 days and aggregates up to 8.46" (215mm) of snow.

Ocean temperature

In Larchmont, in December, the average water temperature is 48°F (8.9°C).
Note: Swimming at temperatures less than 50°F (10°C) in 48°F (8.9°C) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 55.4°F (13°C) without adequate warmth can be discomforting.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:00 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:37 pm EST.

Sunshine

In Larchmont, 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 value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Boost your sun resistance with garments that are densely woven yet spacious. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature and low-temperature in Larchmont during December are 41.9°F (5.5°C) and 32.9°F (0.5°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 86°F (30°C).

What is the most humid month in Larchmont?

February and December, with an average relative humidity of 75%, are most humid months.

What is the average humidity in December?

In December, the average relative humidity is 75%.

How much does it rain in December?

In December, the rain falls for 11.6 days. Throughout December, 2.95" (75mm) of precipitation is accumulated.

How much does it snow in Larchmont in December?

In Larchmont, in December, during 2.5 snowfall days, 1.5" (38mm) of snow is typically accumulated.

What is the water temperature in December?

In Larchmont, the average seawater temperature in December is 48°F (8.9°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

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?

In Larchmont, 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 7:00 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:37 pm EST.

How many hours of sunshine does Larchmont have in December?

In December, the average sunshine duration is 4.9h.

What is the month with 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 December, the average daily maximum UV index 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
Larchmont, NY

Average temperature in December - Larchmont, NY
  • Average high temperature in December: 41.9°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 (36.3°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

Average pressure in December
Larchmont, NY

Average pressure in December - Larchmont, 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
Larchmont, NY

Average wind speed in December - Larchmont, NY
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

Average humidity in December
Larchmont, NY

Average humidity in December - Larchmont, NY
  • Average humidity in December: 75%

The months with the highest relative humidity are February and December (75%).
The month with the lowest relative humidity is August (70%).

Average rainfall in December
Larchmont, NY

Average rainfall in December - Larchmont, NY
  • Average rainfall in December: 2.95"

The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and February (1.69").

Average rainfall days in December
Larchmont, NY

Average rainfall days in December - Larchmont, NY
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in December
Larchmont, NY

Average snowfall in December - Larchmont, NY
  • Average snowfall in December: 1.5"

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Larchmont, NY

Average snowfall days in December - Larchmont, NY
  • Average snowfall days in December: 2.5 days

The months with the highest number of snowfall days are January and February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in December
Larchmont, NY

Average sea temperature in December - Larchmont, NY
  • Average sea temperature in December: 48.1°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

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

Average daylight in December / Average sunshine in December - Larchmont, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Larchmont, NY

Average sunshine days in December - Larchmont, NY
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (12 days).

Average UV index in December
Larchmont, NY

Average UV index in December - Larchmont, 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
Larchmont, NY

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

The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in December
Larchmont, NY

Average visibility in December - Larchmont, 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).

Larchmont, New York, USA

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