December weather forecast
Porterville, NY

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Weather in December

The first month of the winter, December, is also an icy month in Porterville, New York, with an average temperature varying between 34.7°F (1.5°C) and 26.1°F (-3.3°C).

Temperature

The start of December signals a decrease in the average high-temperature, transitioning from a chilly 44.8°F (7.1°C) in November to a cold 34.7°F (1.5°C). A modest decline from daytime high temperatures is noticed in December, marking the average low at a subzero cold 26.1°F (-3.3°C).

Humidity

The average relative humidity in December in Porterville is 86%.

Rainfall

In December, in Porterville, New York, the rain falls for 10.5 days. Throughout December, 2.48" (63mm) of precipitation is accumulated. Throughout the year, in Porterville, there are 174.6 rainfall days, and 29.29" (744mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Porterville, in December, during 17.9 snowfall days, 7.28" (185mm) of snow is typically accumulated. In Porterville, during the entire year, snow falls for 88.4 days and aggregates up to 38.39" (975mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year in Porterville, New York.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:41 pm. On the last day of December, in Porterville, sunrise is at 7:44 am and sunset at 4:50 pm EST.

Sunshine

In December, the average sunshine in Porterville is 2.7h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Porterville. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average UV index of 1 in December transforms into this advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
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Frequently asked questions

How cold is it in Porterville in December?

December temperatures in Porterville, New York, vary between a high-temperature of 34.7°F (1.5°C) and a low-temperature of 26.1°F (-3.3°C).

What is the average humidity in December in Porterville?

In December, the average relative humidity in Porterville, New York, is 86%.

How many days does it rain in December in Porterville?

In Porterville, during December, the rain falls for 10.5 days and regularly aggregates up to 2.48" (63mm) of precipitation.

How many days does it snow in December in Porterville?

In Porterville, during December, snow falls for 17.9 days and regularly aggregates up to 7.28" (185mm) of snow.

What is the month with the shortest days in Porterville?

December has the shortest days of the year, with an average of 9h and 6min of daylight.

How many hours of daylight does Porterville have in December?

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

What time are sunrise and sunset in December in Porterville?

On the first day of December in Porterville, sunrise is at 7:25 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:50 pm EST.

How many hours of sunshine does Porterville have in December?

In Porterville, New York, the average sunshine duration in December is 2.7h.

When is the lowest UV index in Porterville?

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

What is the UV index reading in December in Porterville?

The average daily maximum UV index in December in Porterville is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from 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
Porterville, NY

Average temperature in December - Porterville, NY
  • Average high temperature in December: 34.7°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in December: 26.1°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 (17.8°F).

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Average pressure in December
Porterville, NY

Average pressure in December - Porterville, 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).

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Average wind speed in December
Porterville, NY

Average wind speed in December - Porterville, NY
  • Average wind speed in December: 9.7mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in December
Porterville, NY

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

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are May, July and September (78%).

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Average rainfall in December
Porterville, NY

Average rainfall in December - Porterville, NY
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is September (1.77").

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Average rainfall days in December
Porterville, NY

Average rainfall days in December - Porterville, NY
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (8 days).

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Average snowfall in December
Porterville, NY

Average snowfall in December - Porterville, NY
  • Average snowfall in December: 7.28"

The month with the highest snowfall is February (9.29").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Porterville, NY

Average snowfall days in December - Porterville, NY
  • Average snowfall days in December: 17.9 days

The month with the highest number of snowfall days is January (19.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Porterville, 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: 2h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).

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Average sunshine days in December
Porterville, NY

Average sunshine days in December - Porterville, NY
  • Average sunshine days in December: 7 days

The month with the most sunshine days is September (11.9 days).
The month with the least sunshine days is February (5.3 days).

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Average UV index in December
Porterville, NY

Average UV index in December - Porterville, 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).

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Average cloud cover in December
Porterville, NY

Average cloud cover in December - Porterville, NY
  • Average cloud cover in December: 73

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in December
Porterville, NY

Average visibility in December - Porterville, NY
  • Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (4mi).

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Porterville, New York, USA

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