December weather forecast and climate
Marcy, NY

December, the first month of the winter, in Marcy, is still a cold month, with average temperature ranging between max 32.4°F (0.2°C) and min 23.4°F (-4.8°C).

Temperature

In Marcy, the average high-temperature in December drops, from a frosty 42.8°F (6°C) in November, to a cold 32.4°F (0.2°C). In December, the average low-temperature is 23.4°F (-4.8°C).

Humidity

The average relative humidity in December is 86%.

Rainfall

In December, in Marcy, the rain falls for 12.3 days. Throughout December, 3.46" (88mm) of precipitation is accumulated. In Marcy, New York, during the entire year, the rain falls for 175.3 days and collects up to 38.9" (988mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Marcy, in December, snow falls for 16.8 days, with typically accumulated 10.16" (258mm) of snow. Throughout the year, in Marcy, there are 90 snowfall days, and 47.6" (1209mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h of daylight.

Sunshine

The average sunshine is 2.9h.

UV index

Months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Marcy?

The average high-temperature, in December, is 32.4°F (0.2°C), while the average low-temperature is 23.4°F (-4.8°C).

What is the average humidity in December in Marcy?

In December, the average relative humidity in Marcy is 86%.

How many days does it rain in December in Marcy?

In Marcy, New York, during December, the rain falls for 12.3 days and regularly aggregates up to 3.46" (88mm) of precipitation.

How many days does it snow in December in Marcy?

In December, in Marcy, New York, it is snowing for 16.8 days. Throughout December, 10.16" (258mm) of snow is accumulated.

What is the month with the shortest days in Marcy?

The month with the shortest days in Marcy, New York, is December, with an average of 9h of daylight.

What is the average length of the day in December in Marcy?

The average length of the day in December in Marcy is 9h.

How many hours of sunshine does Marcy have in December?

In Marcy, the average sunshine in December is 2.9h.

What is the month with the lowest UV index in Marcy?

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Marcy.

What is the UV index reading in December in Marcy?

In Marcy, New York, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.
Average temperature in December - Marcy, NY
  • Average high temperature in December: 0.2°C

The warmest month (with the highest average high temperature) is July (25.5°C).
The month with the lowest average high temperature is January (-3.1°C).

  • Average low temperature in December: -4.8°C

The month with the highest average low temperature is July (14.4°C).
The coldest month (with the lowest average low temperature) is January (-9.4°C).

Average pressure in December - Marcy, NY
  • Average pressure in December: 1018mbar

The month with the highest atmospheric pressure is November (1019mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).

Average wind speed in December - Marcy, NY
  • Average wind speed in December: 15km/h

The windiest month (with the highest average wind speed) is January (15.6km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).

Average humidity in December - Marcy, NY
  • Average humidity in December: 86%

Months with the highest relative humidity are January and February (88%).
Months with the lowest relative humidity are April and May (78%).

Average rainfall in December - Marcy, NY
  • Average rainfall in December: 88mm

The wettest month (with the highest rainfall) is April (97mm).
The driest month (with the least rainfall) is September (66mm).

Average rainfall days in December - Marcy, NY
  • Average rainfall days in December: 12.3 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (8.2 days).

Average snowfall in December - Marcy, NY
  • Average snowfall in December: 258mm

The month with the highest snowfall is January (285mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Marcy, NY
  • Average snowfall days in December: 16.8 days

The month with the highest number of snowfall days is January (20.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Marcy, NY
  • Average daylight in December: 9h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in December: 2.9h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 2.4h).

Average sunshine days in December - Marcy, NY
  • Average sunshine days in December: 7.3 days

The month with the most sunshine days is September (13.4 days).
The month with the least sunshine days is February (4.4 days).

Average UV index in December - Marcy, NY
  • Average UV index in December: 1

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February and December (UV index 1).

Average cloud cover in December - Marcy, NY
  • Average cloud cover in December: 70

The month with the most cloud cover is February (Cloud cover 75).
Months with the least cloud cover are July and August (Cloud cover 36).

Average visibility in December - Marcy, NY
  • Average visibility in December: 8km

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (8km).
Months with the lowest visibility are January and February (7km).