December weather forecast
Holbrook, NY

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Weather in December

The first month of the winter, December, is also a frosty month in Holbrook, New York, with temperature in the range of an average low of 37.2°F (2.9°C) and an average high of 44.1°F (6.7°C).

Temperature

Transitioning from November to December involves a subtle drop in average high-temperatures, descending from a fresh 52.3°F (11.3°C) to a frosty 44.1°F (6.7°C). Recording a slight drop from the daily maximum, Holbrook notes an average low temperature of 37.2°F (2.9°C) in the month of December.

Humidity

In Holbrook, the average relative humidity in December is 74%.

Rainfall

December is the month with the most rainfall. Rain falls for 12.3 days and accumulates 3.74" (95mm) of precipitation.

Snowfall

Months with snowfall in Holbrook are January through March, May, October and December. December is the first month it typically snows. Throughout December, in the average 2.4 snowfall days, it receives 1.22" (31mm) of snow. Throughout the year, there are 14.7 snowfall days, and 6.14" (156mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 6:57 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:34 pm EST.

Sunshine

The average sunshine in December is 4.9h.

UV index

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The high-temperature, in December, in Holbrook, records 44.1°F (6.7°C), while the low-temperature is 37.2°F (2.9°C).

What is the average humidity in December?

In Holbrook, the average relative humidity in December is 74%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 12.3 days and accumulates 3.74" (95mm) of precipitation.

How many days does it rain in December?

In December, the rain falls for 12.3 days. Throughout December, 3.74" (95mm) of precipitation is accumulated.

When does it start to snow?

December is the first month it typically snows. Throughout December, in the average 2.4 snowfall days, it receives 1.22" (31mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

In Holbrook, the average day length in December is 9h and 18min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 6:57 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:34 pm EST.

How many hours of sunshine does Holbrook have in December?

In Holbrook, the average sunshine duration in December is 4.9h.

What is the month with the lowest UV index?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December?

In Holbrook, the average daily maximum UV index in December 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
Holbrook, NY

Average temperature in December - Holbrook, NY
  • Average high temperature in December: 44.1°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 37.2°F

The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average pressure in December
Holbrook, NY

Average pressure in December - Holbrook, 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).

Average wind speed in December
Holbrook, NY

Average wind speed in December - Holbrook, NY
  • Average wind speed in December: 13.4mph

The windiest month (with the highest average wind speed) is January (13.8mph).
The calmest months (with the lowest average wind speed) are July and August (9mph).

Average humidity in December
Holbrook, NY

Average humidity in December - Holbrook, NY
  • Average humidity in December: 74%

The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).

Average rainfall in December
Holbrook, NY

Average rainfall in December - Holbrook, NY
  • Average rainfall in December: 3.74"

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is January (2.17").

Average rainfall days in December
Holbrook, NY

Average rainfall days in December - Holbrook, NY
  • Average rainfall days in December: 12.3 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in December
Holbrook, NY

Average snowfall in December - Holbrook, NY
  • Average snowfall in December: 1.22"

The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, June, July, August, September and November (0").

Average snowfall days in December
Holbrook, NY

Average snowfall days in December - Holbrook, NY
  • Average snowfall days in December: 2.4 days

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

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

Average daylight in December / Average sunshine in December - Holbrook, 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 5min

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
Holbrook, NY

Average sunshine days in December - Holbrook, NY
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in December
Holbrook, NY

Average UV index in December - Holbrook, 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 and December (UV index 2).

Average cloud cover in December
Holbrook, NY

Average cloud cover in December - Holbrook, NY
  • Average cloud cover in December: 48

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
Holbrook, NY

Average visibility in December - Holbrook, 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).

Holbrook, New York, USA

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