December weather forecast
Leesburg, NJ

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Weather in December

December, the first month of the winter in Leesburg, is also a frosty month, with an average temperature fluctuating between 45.5°F (7.5°C) and 35.4°F (1.9°C).

Temperature

Leesburg observes a small decrease in the average high-temperature with the arrival of December, falling from November's cool 54°F (12.2°C) to a chilly 45.5°F (7.5°C). Leesburg's average low-temperature in the month of December is recorded at a wintry 35.4°F (1.9°C).

Humidity

The average relative humidity in December is 77%.

Rainfall

In Leesburg, New Jersey, in December, during 9.2 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Leesburg, during the entire year, the rain falls for 132.2 days and collects up to 15.39" (391mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In December, it is snowing for 2.2 days. Throughout December, 0.43" (11mm) of snow is accumulated. In Leesburg, during the entire year, snow falls for 13 days and aggregates up to 3.58" (91mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:47 pm EST.

Sunshine

In Leesburg, the average sunshine in December is 5.2h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily high UV index of 2 in December leads to these guidelines:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.

Frequently asked questions

What is the temperature in December?

The average high-temperature, in December, in Leesburg, is 45.5°F (7.5°C), while the average low-temperature is 35.4°F (1.9°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 87.8°F (31°C).

What is the average humidity in December?

In December, the average relative humidity in Leesburg is 77%.

How many days does it rain in December?

In Leesburg, in December, during 9.2 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Leesburg, in December, during 2.2 snowfall days, 0.43" (11mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

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

In Leesburg, New Jersey, the average day length in December is 9h and 28min.

When is the sunrise / sunset in December in Leesburg?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:47 pm EST.

How many hours of sunshine does Leesburg have in December?

The average sunshine duration in December in Leesburg is 5.2h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from 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
Leesburg, NJ

Average temperature in December - Leesburg, NJ
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in December: 35.4°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in December
Leesburg, NJ

Average pressure in December - Leesburg, NJ
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Leesburg, NJ

Average wind speed in December - Leesburg, NJ
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in December
Leesburg, NJ

Average humidity in December - Leesburg, NJ
  • Average humidity in December: 77%

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

Average rainfall in December
Leesburg, NJ

Average rainfall in December - Leesburg, NJ
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is August (1.81").
The driest month (with the least rainfall) is January (0.75").

Average rainfall days in December
Leesburg, NJ

Average rainfall days in December - Leesburg, NJ
  • Average rainfall days in December: 9.2 days

The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is November (7.3 days).

Average snowfall in December
Leesburg, NJ

Average snowfall in December - Leesburg, NJ
  • Average snowfall in December: 0.43"

The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Leesburg, NJ

Average snowfall days in December - Leesburg, NJ
  • Average snowfall days in December: 2.2 days

The month with the highest number of snowfall days is January (4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Leesburg, NJ
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Leesburg, NJ

Average sunshine days in December - Leesburg, NJ
  • Average sunshine days in December: 20.1 days

The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is July (12.8 days).

Average UV index in December
Leesburg, NJ

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

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

Average cloud cover in December
Leesburg, NJ

Average cloud cover in December - Leesburg, NJ
  • Average cloud cover in December: 45

The months with the most cloud cover are February and March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in December
Leesburg, NJ

Average visibility in December - Leesburg, NJ
  • 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).

Leesburg, New Jersey, USA

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