December weather forecast
Lancaster, NH

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Weather in December

December brings deep winter conditions to Lancaster. As the coldest month after January, it observes an average high temperature of 27.7°F (-2.4°C) and snowfall of 9.53" (242mm). The weather conditions are typical for winter, with low temperatures and increased snowfall. December's relative humidity rises to 86%, bringing crisp and fresh air. Despite the cold temperatures, the holiday spirit envelops Lancaster, transforming the city into a winter wonderland.

Temperature

In Lancaster, the average high-temperature in December drops from a wintry 38.8°F (3.8°C) in November to a freezing cold 27.7°F (-2.4°C). Lancaster, during the month of December, experiences an average low-temperature of 17.2°F (-8.2°C).

Humidity

In December, the average relative humidity is 86%.

Rainfall

In Lancaster, during December, the rain falls for 9.2 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Lancaster, New Hampshire, during the entire year, the rain falls for 150.5 days and collects up to 27.99" (711mm) of precipitation.

Snowfall

Months with snowfall in Lancaster are January through May, October through December. In December, it is snowing for 20 days. Throughout December, 9.53" (242mm) of snow is accumulated. In Lancaster, during the entire year, snow falls for 104.2 days and aggregates up to 61.02" (1550mm) of snow.

Daylight

The month with the shortest days in Lancaster is December, with an average of 8h and 54min of daylight.
On the first day of December, sunrise is at 7:03 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:16 pm EST.

Sunshine

The average sunshine in December is 3h.

UV index

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average UV index of 1 in December transforms into this advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. 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. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

How cold is December in Lancaster?

The high-temperature, in December, in Lancaster, is 27.7°F (-2.4°C), while the low-temperature averages to 17.2°F (-8.2°C).

What is the average humidity in December in Lancaster?

In Lancaster, New Hampshire, the average relative humidity in December is 86%.

How many days does it rain in December in Lancaster?

In Lancaster, New Hampshire, during December, the rain falls for 9.2 days and regularly aggregates up to 2.48" (63mm) of precipitation.

How much does it snow in Lancaster in December?

In December, it is snowing for 20 days. Throughout December, 9.53" (242mm) of snow is accumulated.

What is the month with the shortest days in Lancaster?

With an average of 8h and 54min of daylight, December has the shortest days of the year in Lancaster, New Hampshire.

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

In December, the average day length in Lancaster is 8h and 54min.

When is the sunrise / sunset in December in Lancaster?

On the first day of December in Lancaster, sunrise is at 7:03 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:16 pm EST.

How many hours of sunshine does Lancaster have in December?

In Lancaster, New Hampshire, the average sunshine duration in December is 3h.

When is the lowest UV index in Lancaster?

The months with the lowest UV index are January, February and December, with an average maximum UV index of 1.

How high is the UV index in December in Lancaster?

In December, the average daily maximum UV index in Lancaster, New Hampshire, is 1. A UV Index estimate of 2, and below, represents a low health threat 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
Lancaster, NH

Average temperature in December - Lancaster, NH
  • Average high temperature in December: 27.7°F

The warmest month (with the highest average high temperature) is July (75.6°F).
The month with the lowest average high temperature is January (22.5°F).

  • Average low temperature in December: 17.2°F

The month with the highest average low temperature is July (53.2°F).
The coldest month (with the lowest average low temperature) is January (9°F).

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Average pressure in December
Lancaster, NH

Average pressure in December - Lancaster, NH
  • Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Lancaster, NH

Average wind speed in December - Lancaster, NH
  • Average wind speed in December: 5.8mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in December
Lancaster, NH

Average humidity in December - Lancaster, NH
  • Average humidity in December: 86%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is May (76%).

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Average rainfall in December
Lancaster, NH

Average rainfall in December - Lancaster, NH
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is August (1.97").

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Average rainfall days in December
Lancaster, NH

Average rainfall days in December - Lancaster, NH
  • Average rainfall days in December: 9.2 days

The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (5 days).

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Average snowfall in December
Lancaster, NH

Average snowfall in December - Lancaster, NH
  • Average snowfall in December: 9.53"

The month with the highest snowfall is February (13.43").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Lancaster, NH

Average snowfall days in December - Lancaster, NH
  • Average snowfall days in December: 20 days

The month with the highest number of snowfall days is January (21.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Lancaster, NH

Average daylight in December / Average sunshine in December - Lancaster, NH
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in December: 3h and 0min

The month with the most sunshine is August (Average sunshine: 9h and 30min).
The months with the least sunshine are January and February (Average sunshine: 2h and 36min).

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Average sunshine days in December
Lancaster, NH

Average sunshine days in December - Lancaster, NH
  • Average sunshine days in December: 8 days

The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (6.3 days).

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Average UV index in December
Lancaster, NH

Average UV index in December - Lancaster, NH
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in December
Lancaster, NH

Average cloud cover in December - Lancaster, NH
  • Average cloud cover in December: 72

The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 42).

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Average visibility in December
Lancaster, NH

Average visibility in December - Lancaster, NH
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July and November (5mi).
The months with the lowest visibility are January, February, March, April, August, September, October and December (4mi).

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Lancaster, New Hampshire, USA

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