December weather forecast
Seneca Castle, NY

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Weather in December

The first month of the winter, December, is also an icy month in Seneca Castle, New York, with an average temperature fluctuating between 26.6°F (-3°C) and 35.4°F (1.9°C).

Temperature

The shift to December brings a decrease in the average high-temperature, falling from a chilly 46.2°F (7.9°C) in November to an icy 35.4°F (1.9°C). During the nights of December, the average low-temperature holds at a freezing cold 26.6°F (-3°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Seneca Castle, New York, in December, during 9.5 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, in Seneca Castle, there are 157.9 rainfall days, and 22.48" (571mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In December, it is snowing for 14.7 days. Throughout December, 4.02" (102mm) of snow is accumulated. Throughout the year, there are 71.3 snowfall days, and 19.41" (493mm) of snow is accumulated.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year in Seneca Castle.
On the first day of December, sunrise is at 7:20 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:44 pm EST.

Sunshine

The average sunshine in December is 3.1h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 1 translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Jun 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The high-temperature during December is 35.4°F (1.9°C) and the low-temperature is 26.6°F (-3°C).

What is the average humidity in December?

In December, the average relative humidity is 84%.

How many days does it rain in December?

In December, in Seneca Castle, the rain falls for 9.5 days. Throughout December, 1.57" (40mm) of precipitation is accumulated.

How much does it snow in December?

In Seneca Castle, during December, snow falls for 14.7 days and regularly aggregates up to 4.02" (102mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 6min of daylight.

How many hours of daylight does Seneca Castle have in December?

In Seneca Castle, the average day length in December is 9h and 5min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:20 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:44 pm EST.

How many hours of sunshine does Seneca Castle have in December?

In Seneca Castle, the average sunshine duration in December is 3.1h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
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
Seneca Castle, NY

Average temperature in December - Seneca Castle, NY
  • Average high temperature in December: 35.4°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (29.5°F).

  • Average low temperature in December: 26.6°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

Average pressure in December
Seneca Castle, NY

Average pressure in December - Seneca Castle, NY
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Seneca Castle, NY

Average wind speed in December - Seneca Castle, NY
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Seneca Castle, NY

Average humidity in December - Seneca Castle, NY
  • Average humidity in December: 84%

The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (77%).

Average rainfall in December
Seneca Castle, NY

Average rainfall in December - Seneca Castle, NY
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is October (2.64").
The driest month (with the least rainfall) is January (1.14").

Average rainfall days in December
Seneca Castle, NY

Average rainfall days in December - Seneca Castle, NY
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in December
Seneca Castle, NY

Average snowfall in December - Seneca Castle, NY
  • Average snowfall in December: 4.02"

The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Seneca Castle, NY

Average snowfall days in December - Seneca Castle, NY
  • Average snowfall days in December: 14.7 days

The month with the highest number of snowfall days is January (18.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Seneca Castle, NY

Average daylight in December / Average sunshine in December - Seneca Castle, NY
  • Average daylight in December: 9h and 1min

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

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).

Average sunshine days in December
Seneca Castle, NY

Average sunshine days in December - Seneca Castle, NY
  • Average sunshine days in December: 8.7 days

The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is February (6.5 days).

Average UV index in December
Seneca Castle, NY

Average UV index in December - Seneca Castle, NY
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Seneca Castle, NY

Average cloud cover in December - Seneca Castle, NY
  • Average cloud cover in December: 68

The months with the most cloud cover are January and February (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 32).

Average visibility in December
Seneca Castle, NY

Average visibility in December - Seneca Castle, NY
  • Average visibility in December: 6mi

The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).

Seneca Castle, New York, USA

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