December weather forecast
Valley Stream, NY

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Weather in December

In December, Valley Stream rounds out the year and re-enters winter properly. Low temperatures averaging at 36°F (2.2°C) and frequent snowfall become a distinctive feature of this month. The city turns into a winter wonderland as the first flurries drop, mirroring the holiday season's spiritedly festive mood. Buildings and lanes become adorned with festive lights, adding to the beautiful snowy landscape. The chilly and short days of December make it a perfect time to enjoy cozy indoor activities or take winter walks when the snow temporarily subsides.

Temperature

December's arrival aligns with a minor decrease in average high-temperatures, from November's fresh 51.6°F (10.9°C) to a frosty 43.5°F (6.4°C). Valley Stream experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 36°F (2.2°C) throughout December.

Humidity

In December, the average relative humidity is 75%.

Rainfall

In Valley Stream, in December, during 10.7 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. In Valley Stream, during the entire year, the rain falls for 135.3 days and collects up to 18.62" (473mm) of precipitation.

Snowfall

January through March, October through December are months with snowfall. In Valley Stream, during December, snow falls for 2.8 days and regularly aggregates up to 0.59" (15mm) of snow. In Valley Stream, during the entire year, snow falls for 15.8 days and aggregates up to 2.95" (75mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:37 pm EST.

Sunshine

In December, the average sunshine is 5h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Valley Stream. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold in Valley Stream during December?

The high-temperature during December is 43.5°F (6.4°C) and the low-temperature is 36°F (2.2°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 84.2°F (29°C).

What is the average humidity in December in Valley Stream?

In Valley Stream, New York, the average relative humidity in December is 75%.

How much does it rain in Valley Stream in December?

In December, in Valley Stream, the rain falls for 10.7 days. Throughout December, 1.65" (42mm) of precipitation is accumulated.

How many days does it snow in December in Valley Stream?

In December, it is snowing for 2.8 days. Throughout December, 0.59" (15mm) of snow is accumulated.

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

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

How many hours of daylight does Valley Stream have in December?

In December, the average day length is 9h and 19min.

What time are sunrise and sunset in December in Valley Stream?

In December, on the first day of the month, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of the month, in Valley Stream, sunrise is at 7:18 am and sunset at 4:37 pm EST.

How many hours of sunshine does Valley Stream have in December?

In Valley Stream, New York, the average sunshine duration in December is 5h.

What is the month with the lowest UV index in Valley Stream?

The months with the lowest UV index in Valley Stream, New York, are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Valley Stream?

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

Average temperature in December - Valley Stream, NY
  • Average high temperature in December: 43.5°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 36°F

The month with the highest average low temperature is August (71.1°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

Average pressure in December
Valley Stream, NY

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

Average wind speed in December - Valley Stream, NY
  • Average wind speed in December: 11.9mph

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8mph).

Average humidity in December
Valley Stream, NY

Average humidity in December - Valley Stream, NY
  • Average humidity in December: 75%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (72%).

Average rainfall in December
Valley Stream, NY

Average rainfall in December - Valley Stream, NY
  • Average rainfall in December: 1.65"

The wettest months (with the highest rainfall) are July and August (2.32").
The driest month (with the least rainfall) is January (0.91").

Average rainfall days in December
Valley Stream, NY

Average rainfall days in December - Valley Stream, NY
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in December
Valley Stream, NY

Average snowfall in December - Valley Stream, NY
  • Average snowfall in December: 0.59"

The month with the highest snowfall is March (1.02").
The months with the least snowfall are April, May, June, July, August and September (0").

Average snowfall days in December
Valley Stream, NY

Average snowfall days in December - Valley Stream, NY
  • Average snowfall days in December: 2.8 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Valley Stream, NY
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in December
Valley Stream, NY

Average sunshine days in December - Valley Stream, NY
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is July (13.6 days).

Average UV index in December
Valley Stream, NY

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

Average cloud cover in December - Valley Stream, NY
  • Average cloud cover in December: 47

The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
Valley Stream, NY

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

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

Valley Stream, New York, USA

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