December weather forecast
Central Valley, NY

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Weather in December

The first month of the winter, December, is still a cold month in Central Valley, New York, with an average temperature varying between 27.3°F (-2.6°C) and 38.8°F (3.8°C).

Temperature

As November transitions to December, the average high-temperature falls from a frosty 48.6°F (9.2°C) to a wintry 38.8°F (3.8°C). During the month of December, the temperature falls to an average of 27.3°F (-2.6°C).

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 81%.

Rainfall

In Central Valley, New York, in December, it is raining for 8.4 days, with typically 2.32" (59mm) of accumulated precipitation. In Central Valley, during the entire year, the rain falls for 141.2 days and collects up to 25" (635mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 4.9 days. Throughout December, 2.83" (72mm) of snow is accumulated. Throughout the year, there are 28.3 snowfall days, and 17.68" (449mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:03 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:37 pm EST.

Sunshine

In Central Valley, the average sunshine in December is 4.7h.

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 minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In Central Valley, in December, the average high-temperature is 38.8°F (3.8°C), and the average low-temperature is 27.3°F (-2.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 86°F (30°C).

What is the most humid month?

February and December, with an average relative humidity of 81%, are most humid months.

What is the average humidity in December?

In Central Valley, the average relative humidity in December is 81%.

How many days does it rain in December?

In Central Valley, in December, during 8.4 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

How many days does it snow in December?

In December, it is snowing for 4.9 days. Throughout December, 2.83" (72mm) of snow is accumulated.

What is the month with the shortest days in Central Valley?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 15min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:37 pm EST.

How long on average sun shines in December in Central Valley?

In December, the average sunshine duration is 4.7h.

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?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat 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
Central Valley, NY

Average temperature in December - Central Valley, NY
  • Average high temperature in December: 38.8°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in December
Central Valley, NY

Average pressure in December - Central Valley, 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
Central Valley, NY

Average wind speed in December - Central Valley, NY
  • Average wind speed in December: 6.5mph

The windiest months (with the highest average wind speed) are January, February and March (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

Average humidity in December
Central Valley, NY

Average humidity in December - Central Valley, NY
  • Average humidity in December: 81%

The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is April (74%).

Average rainfall in December
Central Valley, NY

Average rainfall in December - Central Valley, NY
  • Average rainfall in December: 2.32"

The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in December
Central Valley, NY

Average rainfall days in December - Central Valley, NY
  • Average rainfall days in December: 8.4 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (5.5 days).

Average snowfall in December
Central Valley, NY

Average snowfall in December - Central Valley, NY
  • Average snowfall in December: 2.83"

The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Central Valley, NY

Average snowfall days in December - Central Valley, NY
  • Average snowfall days in December: 4.9 days

The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Central Valley, NY

Average daylight in December / Average sunshine in December - Central Valley, 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 4min

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 30min).

Average sunshine days in December
Central Valley, NY

Average sunshine days in December - Central Valley, NY
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.8 days).

Average UV index in December
Central Valley, NY

Average UV index in December - Central Valley, 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
Central Valley, NY

Average cloud cover in December - Central Valley, NY
  • Average cloud cover in December: 48

The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in December
Central Valley, NY

Average visibility in December - Central Valley, NY
  • Average visibility in December: 6mi

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

Central Valley, New York, USA

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