December weather forecast and climate
Port Republic, NJ

The first month of the winter, December, is still a chilly month in Port Republic, New Jersey, with average temperature varying between 37°F (2.8°C) and 46°F (7.8°C).

Temperature

In Port Republic, New Jersey, the average high-temperature slightly decreases, from a cool 53.6°F (12°C) in November, to a chilly 46°F (7.8°C). In Port Republic, the average low-temperature is 37°F (2.8°C).

Humidity

The average relative humidity in December is 76%.

Rainfall

December is the month with the most rainfall in Port Republic. Rain falls for 5.5 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

January through March and December are months with snowfall in Port Republic, New Jersey. December is the first month it typically snows. Throughout December, in the average 1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 6 snowfall days, and 0.59" (15mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Port Republic, New Jersey, with an average of 9.4h of daylight.

Sunshine

The average sunshine in Port Republic is 5.2h.

UV index

Months with the lowest UV index in Port Republic are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Port Republic?

In December, in Port Republic, New Jersey, the average high-temperature is 46°F (7.8°C), and the average low-temperature is 37°F (2.8°C).

What is the average humidity in December in Port Republic?

In Port Republic, the average relative humidity in December is 76%.

How much does it rain in Port Republic in December?

In Port Republic, New Jersey, in December, it is raining for 5.5 days, with typically 0.75" (19mm) of accumulated precipitation.

What is the rainiest month in Port Republic?

The month with the most rainfall in Port Republic, New Jersey, is December when the rain falls for 5.5 days and typically aggregates up to 0.75" (19mm) of precipitation.

When does it start snowing in Port Republic?

December is the first month it typically snows in Port Republic. Throughout December, in the average 1 snowfall days, it receives 0.08" (2mm) of snow.

What is the month with the shortest days in Port Republic?

With an average of 9.4h of daylight, December has the shortest days of the year in Port Republic.

How many hours of daylight does Port Republic have in December?

The average length of the day in December is 9.4h.

How long on average sun shines in December in Port Republic?

In Port Republic, New Jersey, the average sunshine in December is 5.2h.

What is the month with the lowest UV index in Port Republic?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Port Republic, New Jersey.

How high is the UV index in December in Port Republic?

In Port Republic, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Port Republic, NJ
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in December: 37°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).

Average pressure in December - Port Republic, NJ
  • Average pressure in December: 30.09"

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.94").

Average wind speed in December - Port Republic, NJ
  • Average wind speed in December: 11.1mph

The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is August (8mph).

Average humidity in December - Port Republic, NJ
  • Average humidity in December: 76%

Months with the highest relative humidity are May and June (80%).
Months with the lowest relative humidity are January, March, April and November (74%).

Average rainfall in December - Port Republic, NJ
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is December (0.75").
The driest month (with the least rainfall) is September (0.28").

Average rainfall days in December - Port Republic, NJ
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is January (4.5 days).

Average snowfall in December - Port Republic, NJ
  • Average snowfall in December: 0.08"

The month with the highest snowfall is January (0.2").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December - Port Republic, NJ
  • Average snowfall days in December: 1 days

The month with the highest number of snowfall days is January (1.9 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in December / Average sunshine in December - Port Republic, NJ
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.2h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in December - Port Republic, NJ
  • Average sunshine days in December: 23.6 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is August (18.2 days).

Average UV index in December - Port Republic, NJ
  • Average UV index in December: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in December - Port Republic, NJ
  • Average cloud cover in December: 45

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

Average visibility in December - Port Republic, NJ
  • Average visibility in December: 6mi

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