December weather forecast and climate
Francis Mills, NJ

Weather in December

The first month of the winter, December, is still a chilly month in Francis Mills, New Jersey, with average temperature fluctuating between 43.9°F (6.6°C) and 32.7°F (0.4°C).

Temperature

In December, the average high-temperature marginally drops, from a fresh 52.5°F (11.4°C) in November, to a chilly 43.9°F (6.6°C). The average low-temperature, in December, is 32.7°F (0.4°C).

Humidity

The average relative humidity in Francis Mills is 78%.

Rainfall

In Francis Mills, New Jersey, in December, during 11 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. In Francis Mills, during the entire year, the rain falls for 154.3 days and collects up to 29.25" (743mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Francis Mills, during December, snow falls for 3.2 days and regularly aggregates up to 1.14" (29mm) of snow. Throughout the year, there are 18.9 snowfall days, and 8.39" (213mm) of snow is accumulated.

Daylight

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

Sunshine

The average sunshine in December 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 Francis Mills. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 2 transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Francis Mills?

The average high-temperature, in December, is 43.9°F (6.6°C), while the average low-temperature is 32.7°F (0.4°C).

What is the average humidity in December in Francis Mills?

The average relative humidity in December in Francis Mills is 78%.

How many days does it rain in December in Francis Mills?

In December, the rain falls for 11 days. Throughout December, 2.95" (75mm) of precipitation is accumulated.

How much does it snow in Francis Mills in December?

In December, in Francis Mills, it is snowing for 3.2 days. Throughout December, 1.14" (29mm) of snow is accumulated.

What is the month with the shortest days in Francis Mills?

The month with the shortest days is December, with an average of 9.4h of daylight.

What is the average length of the day in December in Francis Mills?

In Francis Mills, the average length of the day in December is 9.4h.

How many hours of sunshine does Francis Mills have in December?

The average sunshine in December in Francis Mills is 5h.

What is the month with the lowest UV index in Francis Mills?

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

What is the UV index reading in December in Francis Mills?

In Francis Mills, New Jersey, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV radiation.

Average temperature in December
Francis Mills, NJ

Average temperature in December - Francis Mills, NJ
  • Average high temperature in December: 43.9°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

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Average pressure in December
Francis Mills, NJ

Average pressure in December - Francis Mills, NJ
  • Average pressure in December: 30.08"

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

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Average wind speed in December
Francis Mills, NJ

Average wind speed in December - Francis Mills, NJ
  • Average wind speed in December: 8.5mph

The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in December
Francis Mills, NJ

Average humidity in December - Francis Mills, NJ
  • Average humidity in December: 78%

Months with the highest relative humidity are June and October (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Francis Mills, NJ

Average rainfall in December - Francis Mills, NJ
  • Average rainfall in December: 2.95"

The wettest month (with the highest rainfall) is July (3.5").
The driest month (with the least rainfall) is September (1.69").

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Average rainfall days in December
Francis Mills, NJ

Average rainfall days in December - Francis Mills, NJ
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in December
Francis Mills, NJ

Average snowfall in December - Francis Mills, NJ
  • Average snowfall in December: 1.14"

The month with the highest snowfall is March (3.23").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in December
Francis Mills, NJ

Average snowfall days in December - Francis Mills, NJ
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (5.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Francis Mills, NJ

Average daylight in December / Average sunshine in December - Francis Mills, NJ
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in December
Francis Mills, NJ

Average sunshine days in December - Francis Mills, NJ
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in December
Francis Mills, NJ

Average UV index in December - Francis Mills, NJ
  • Average UV index in December: 2

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

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Average cloud cover in December
Francis Mills, NJ

Average cloud cover in December - Francis Mills, NJ
  • Average cloud cover in December: 47

Months with the most cloud cover are February, March and December (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 31).

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Average visibility in December
Francis Mills, NJ

Average visibility in December - Francis Mills, 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).

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