December weather forecast
Marietta, NY

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Weather in December

The first month of the winter, December, is also a wintry month in Marietta, New York, with an average temperature varying between 34.3°F (1.3°C) and 25.3°F (-3.7°C).

Temperature

The onset of December comes with a shift in the average high-temperature, falling from a frosty 44.6°F (7°C) in November to a wintry 34.3°F (1.3°C). Marietta's average low temperature, barely cooler than the daytime high, steadies at a freezing cold 25.3°F (-3.7°C) during December.

Humidity

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

Rainfall

In December, in Marietta, New York, the rain falls for 8.9 days. Throughout December, 1.1" (28mm) of precipitation is accumulated. In Marietta, during the entire year, the rain falls for 137.8 days and collects up to 13.74" (349mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 15.1 days. Throughout December, 3.23" (82mm) of snow is accumulated. In Marietta, during the entire year, snow falls for 76.2 days and aggregates up to 16.93" (430mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year.
On the first day of December in Marietta, New York, sunrise is at 7:17 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:41 pm EST.

Sunshine

In December, the average sunshine in Marietta is 3h.

UV index

February and December, with an average maximum UV index of 1, are months with the lowest UV index in Marietta. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Opt for tightly woven and loose clothing to enhance protection from the Sun. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold is it in Marietta in December?

December temperatures in Marietta, New York, vary between a high-temperature of 34.3°F (1.3°C) and a low-temperature of 25.3°F (-3.7°C).

What is the average humidity in December in Marietta?

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

How many days does it rain in December in Marietta?

In Marietta, during December, the rain falls for 8.9 days and regularly aggregates up to 1.1" (28mm) of precipitation.

How much does it snow in Marietta in December?

In December, in Marietta, New York, it is snowing for 15.1 days. Throughout December, 3.23" (82mm) of snow is accumulated.

What is the month with the shortest days in Marietta?

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

How many hours of daylight does Marietta have in December?

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

What time are sunrise and sunset in December in Marietta?

On the first day of December, sunrise is at 7:17 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:41 pm EST.

How many hours of sunshine does Marietta have in December?

In December, the average sunshine duration in Marietta, New York, is 3h.

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

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

How high is the UV index in December in Marietta?

In Marietta, New York, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to 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
Marietta, NY

Average temperature in December - Marietta, NY
  • Average high temperature in December: 34.3°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 (27.9°F).

  • Average low temperature in December: 25.3°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).

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Average pressure in December
Marietta, NY

Average pressure in December - Marietta, 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
Marietta, NY

Average wind speed in December - Marietta, NY
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6mph).

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Average humidity in December
Marietta, NY

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

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (79%).

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Average rainfall in December
Marietta, NY

Average rainfall in December - Marietta, NY
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is September (0.67").

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Average rainfall days in December
Marietta, NY

Average rainfall days in December - Marietta, NY
  • Average rainfall days in December: 8.9 days

The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is February (6.7 days).

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Average snowfall in December
Marietta, NY

Average snowfall in December - Marietta, NY
  • Average snowfall in December: 3.23"

The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Marietta, NY

Average snowfall days in December - Marietta, NY
  • Average snowfall days in December: 15.1 days

The month with the highest number of snowfall days is January (18.1 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
Marietta, NY

Average daylight in December / Average sunshine in December - Marietta, 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 0min

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 30min).

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Average sunshine days in December
Marietta, NY

Average sunshine days in December - Marietta, NY
  • Average sunshine days in December: 10.5 days

The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is February (7.9 days).

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Average UV index in December
Marietta, NY

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in December
Marietta, NY

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

The month with the most cloud cover is February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in December
Marietta, NY

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

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

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Marietta, New York, USA

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