December weather forecast
Florham Park, NJ

Share

Weather in December

The first month of the winter, December, is also a wintry month in Florham Park, New Jersey, with an average temperature varying between 40.8°F (4.9°C) and 29.7°F (-1.3°C).

Temperature

December brings a drop in Florham Park's average high-temperature, falling from a cool 50.5°F (10.3°C) in November to an icy 40.8°F (4.9°C). Florham Park, during December nights, observes an average temperature of 29.7°F (-1.3°C).

Humidity

February and December, with an average relative humidity of 80%, are the most humid months.

Rainfall

In Florham Park, in December, during 11.6 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. In Florham Park, during the entire year, the rain falls for 164.2 days and collects up to 30.67" (779mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Florham Park, in December, snow falls for 4 days, with typically accumulated 1.61" (41mm) of snow. Throughout the year, there are 26 snowfall days, and 11.61" (295mm) of snow is accumulated.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:40 pm EST.

Sunshine

In December, the average sunshine is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold in Florham Park?

December temperatures vary between a high-temperature of 40.8°F (4.9°C) and a low-temperature of 29.7°F (-1.3°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 87.8°F (31°C).

What is the most humid month?

February and December, with an average relative humidity of 80%, are most humid months.

What is the average humidity in December?

The average relative humidity in December is 80%.

How many days does it rain in December?

In Florham Park, during December, the rain falls for 11.6 days and regularly aggregates up to 3.03" (77mm) of precipitation.

How many days does it snow in December?

In Florham Park, in December, snow falls for 4 days, with typically accumulated 1.61" (41mm) 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.

How many hours of daylight does Florham Park have in December?

The average day length in December is 9h and 19min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:40 pm EST.

How long on average sun shines in December?

In Florham Park, the average sunshine duration in December is 4.8h.

When is the lowest UV index in Florham Park?

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

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Florham Park, NJ

Average temperature in December - Florham Park, NJ
  • Average high temperature in December: 40.8°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in December
Florham Park, NJ

Average pressure in December - Florham Park, NJ
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Florham Park, NJ

Average wind speed in December - Florham Park, NJ
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in December
Florham Park, NJ

Average humidity in December - Florham Park, NJ
  • Average humidity in December: 80%

The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April and August (74%).

Average rainfall in December
Florham Park, NJ

Average rainfall in December - Florham Park, NJ
  • Average rainfall in December: 3.03"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days in December
Florham Park, NJ

Average rainfall days in December - Florham Park, NJ
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in December
Florham Park, NJ

Average snowfall in December - Florham Park, NJ
  • Average snowfall in December: 1.61"

The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Florham Park, NJ

Average snowfall days in December - Florham Park, NJ
  • Average snowfall days in December: 4 days

The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Florham Park, NJ

Average daylight in December / Average sunshine in December - Florham Park, NJ
  • 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in December
Florham Park, NJ

Average sunshine days in December - Florham Park, NJ
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).

Average UV index in December
Florham Park, NJ

Average UV index in December - Florham Park, NJ
  • 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
Florham Park, NJ

Average cloud cover in December - Florham Park, NJ
  • Average cloud cover in December: 48

The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in December
Florham Park, NJ

Average visibility in December - Florham Park, NJ
  • Average visibility in December: 6mi

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

Florham Park, New Jersey, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location