December weather forecast
Ironia, NJ

Share

Weather in December

December, the first month of the winter in Ironia, is also a wintry month, with an average temperature ranging between min 28.2°F (-2.1°C) and max 39.9°F (4.4°C).

Temperature

December ushers in a slight temperature change, with average high-temperatures reducing from November's chilly 49.3°F (9.6°C) to a wintry 39.9°F (4.4°C). Ironia observes an average nighttime low-temperature of 28.2°F (-2.1°C) during the month of December.

Humidity

In Ironia, the average relative humidity in December is 80%.

Rainfall

December is the month with the most rainfall. Rain falls for 11.1 days and accumulates 3.27" (83mm) of precipitation.

Snowfall

Months with snowfall in Ironia, New Jersey, are January through May, October through December. In Ironia, in December, during 5.2 snowfall days, 3.5" (89mm) of snow is typically accumulated. Throughout the year, there are 34.7 snowfall days, and 20.71" (526mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Ironia, New Jersey, with an average of 9h and 18min of daylight.
On the first day of December in Ironia, sunrise is at 7:04 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:40 pm EST.

Sunshine

The average sunshine in December in Ironia 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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In December, an average UV index of 2 transforms into the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
[Resources]

Frequently asked questions

How cold is December in Ironia?

The high-temperature, in December, in Ironia, is 39.9°F (4.4°C), while the low-temperature averages to 28.2°F (-2.1°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 86°F (30°C).

What is the average humidity in December in Ironia?

In Ironia, New Jersey, the average relative humidity in December is 80%.

What is the wettest month in Ironia?

December is the month with the most rainfall. Rain falls for 11.1 days and accumulates 3.27" (83mm) of precipitation.

How much does it rain in Ironia in December?

In Ironia, New Jersey, during December, the rain falls for 11.1 days and regularly aggregates up to 3.27" (83mm) of precipitation.

How much does it snow in Ironia in December?

In December, in Ironia, New Jersey, it is snowing for 5.2 days. Throughout December, 3.5" (89mm) of snow is accumulated.

What is the month with the shortest days in Ironia?

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

What is the average length of the day in December in Ironia?

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

When are sunrise and sunset in December in Ironia?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:31 pm. On the last day of the month, in Ironia, New Jersey, sunrise is at 7:22 am and sunset at 4:40 pm EST.

How long on average sun shines in December in Ironia?

In December, the average sunshine duration in Ironia, New Jersey, is 4.8h.

When is the lowest UV index in Ironia?

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

What is the UV index intensity in December in Ironia?

In Ironia, New Jersey, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Ironia, NJ

Average temperature in December - Ironia, NJ
  • Average high temperature in December: 39.9°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28.2°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21°F).

[Resources]

Average pressure in December
Ironia, NJ

Average pressure in December - Ironia, 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).

[Resources]

Average wind speed in December
Ironia, NJ

Average wind speed in December - Ironia, NJ
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

[Resources]

Average humidity in December
Ironia, NJ

Average humidity in December - Ironia, NJ
  • Average humidity in December: 80%

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

[Resources]

Average rainfall in December
Ironia, NJ

Average rainfall in December - Ironia, NJ
  • Average rainfall in December: 3.27"

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.02").

[Resources]

Average rainfall days in December
Ironia, NJ

Average rainfall days in December - Ironia, NJ
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is January (7.5 days).

[Resources]

Average snowfall in December
Ironia, NJ

Average snowfall in December - Ironia, NJ
  • Average snowfall in December: 3.5"

The month with the highest snowfall is March (5.24").
The months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in December
Ironia, NJ

Average snowfall days in December - Ironia, NJ
  • Average snowfall days in December: 5.2 days

The month with the highest number of snowfall days is February (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Ironia, NJ

Average daylight in December / Average sunshine in December - Ironia, 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 30min).

[Resources]

Average sunshine days in December
Ironia, NJ

Average sunshine days in December - Ironia, NJ
  • Average sunshine days in December: 16.2 days

The month with the most sunshine days is September (19.6 days).
The month with the least sunshine days is April (12.3 days).

[Resources]

Average UV index in December
Ironia, NJ

Average UV index in December - Ironia, NJ
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

[Resources]

Average cloud cover in December
Ironia, NJ

Average cloud cover in December - Ironia, NJ
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).

[Resources]

Average visibility in December
Ironia, NJ

Average visibility in December - Ironia, NJ
  • Average visibility in December: 6mi

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

[Resources]

Ironia, New Jersey, USA

Weather forecast for your location

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