Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Seneca Castle have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Seneca Castle have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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