December weather forecast
Watertown, NY

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Weather in December

With the arrival of December, Watertown plunges into winter, with temperatures dropping significantly from November. Witnessing an increase in snowfall to 9.96" (253mm), the festive season sees the city cloaked in a white blanket of snow. The bitter chill in the air is constant, with frosty mornings leading to colder nights. Battery Park and Thompson Park offer spectacular snowy landscapes under the limited sunlight, adding to the Christmas cheer. Nearing the end of the year, cold yet enchanting weather dominates Watertown city in December.

Temperature

December weather is marked by a drop in the average high-temperature, falling from a frosty 42.8°F (6°C) in November to a cold 32.2°F (0.1°C). Throughout the nights in December, Watertown notes an average low of 23.2°F (-4.9°C), a small dip from the daytime peak.

Humidity

In Watertown, the average relative humidity in December is 85%.

Rainfall

In Watertown, New York, in December, it is raining for 10.7 days, with typically 3.27" (83mm) of accumulated precipitation. Throughout the year, in Watertown, New York, there are 163.9 rainfall days, and 33.19" (843mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Watertown, in December, during 15.9 snowfall days, 9.96" (253mm) of snow is typically accumulated. Throughout the year, there are 84.4 snowfall days, and 43.58" (1107mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year.
On the first day of December in Watertown, sunrise is at 7:18 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:35 pm EST.

Sunshine

The average sunshine in December in Watertown is 3h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Watertown. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 1 suggests these recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

How cold is December in Watertown?

In December, the average high-temperature and low-temperature are 32.2°F (0.1°C) and 23.2°F (-4.9°C) respectively.

What is the average humidity in December in Watertown?

The average relative humidity in December in Watertown is 85%.

How many days does it rain in December in Watertown?

In Watertown, during December, the rain falls for 10.7 days and regularly aggregates up to 3.27" (83mm) of precipitation.

How much does it snow in Watertown in December?

In Watertown, during December, snow falls for 15.9 days and regularly aggregates up to 9.96" (253mm) of snow.

What is the month with the shortest days in Watertown?

With an average of 9h and 0min of daylight, December has the shortest days of the year.

How many hours of daylight does Watertown have in December?

In December, the average day length is 8h and 58min.

When are sunrise and sunset in December in Watertown?

On the first day of December in Watertown, New York, sunrise is at 7:18 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:35 pm EST.

How long on average sun shines in December in Watertown?

In Watertown, the average sunshine duration in December is 3h.

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

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

What is the UV index intensity in December in Watertown?

In Watertown, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe 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
Watertown, NY

Average temperature in December - Watertown, NY
  • Average high temperature in December: 32.2°F

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (26.1°F).

  • Average low temperature in December: 23.2°F

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

Average pressure in December
Watertown, NY

Average pressure in December - Watertown, NY
  • Average pressure in December: 30.05"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Watertown, NY

Average wind speed in December - Watertown, NY
  • Average wind speed in December: 10mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

Average humidity in December
Watertown, NY

Average humidity in December - Watertown, NY
  • Average humidity in December: 85%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and September (77%).

Average rainfall in December
Watertown, NY

Average rainfall in December - Watertown, NY
  • Average rainfall in December: 3.27"

The wettest month (with the highest rainfall) is October (3.54").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in December
Watertown, NY

Average rainfall days in December - Watertown, NY
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is October (17.7 days).
The month with the least rainy days is February (7 days).

Average snowfall in December
Watertown, NY

Average snowfall in December - Watertown, NY
  • Average snowfall in December: 9.96"

The month with the highest snowfall is January (10.47").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Watertown, NY

Average snowfall days in December - Watertown, NY
  • Average snowfall days in December: 15.9 days

The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Watertown, NY
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 3h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 2h and 42min).

Average sunshine days in December
Watertown, NY

Average sunshine days in December - Watertown, NY
  • Average sunshine days in December: 7.9 days

The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is February (6.7 days).

Average UV index in December
Watertown, NY

Average UV index in December - Watertown, 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
Watertown, NY

Average cloud cover in December - Watertown, NY
  • Average cloud cover in December: 69

The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in December
Watertown, NY

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

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

Watertown, New York, USA

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