December weather forecast
Hollis, NH

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Weather in December

December is a time of significant change in Hollis, New Hampshire, as it fully transitions into winter. The town experiences the heaviest snowfall of the year, measuring 1.26" (32mm), presenting a white wonderland. Christmas festivities take over the town, bringing warmth and cheer despite the colder temperatures. The daylight hours are at their shortest, leading to longer nights. Wind speeds continue to increase, adding a biting chill to the winter air.

Temperature

December brings a drop in Hollis's average high-temperature, falling from a chilly 47.3°F (8.5°C) in November to an icy 36.5°F (2.5°C). December nights in Hollis are marked by an average temperature drop to a freezing cold 25.7°F (-3.5°C).

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Hollis, in December, during 6.1 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, in Hollis, there are 91.2 rainfall days, and 7.24" (184mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. The months with the most snowfall in Hollis are February and December, with an average 1.26" (32mm) of accumulated snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year in Hollis.
On the first day of the month, sunrise is at 6:57 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:22 pm EST.

Sunshine

In Hollis, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index in Hollis are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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Frequently asked questions

How cold is it in Hollis in December?

During December, Hollis experiences an average high-temperature of 36.5°F (2.5°C) and a low-temperature of 25.7°F (-3.5°C). In July, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 87.8°F (31°C).

What is the average humidity in December in Hollis?

In Hollis, the average relative humidity in December is 79%.

How many days does it rain in December in Hollis?

In Hollis, during December, the rain falls for 6.1 days and regularly aggregates up to 0.63" (16mm) of precipitation.

What is the snowiest month in Hollis?

The months with the most snowfall in Hollis are February and December, with an average 1.26" (32mm) of accumulated snow.

How many days does it snow in December in Hollis?

In Hollis, New Hampshire, during December, snow falls for 3.8 days and regularly aggregates up to 1.26" (32mm) of snow.

What is the month with the shortest days in Hollis?

December has the shortest days of the year, with an average of 9h and 6min of daylight.

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

In Hollis, the average day length in December is 9h and 6min.

When is the sunrise / sunset in December in Hollis?

In December, on the first day of the month, sunrise is at 6:57 am and sunset at 4:13 pm. On the last day of the month, in Hollis, New Hampshire, sunrise is at 7:16 am and sunset at 4:22 pm EST.

How many hours of sunshine does Hollis have in December?

The average sunshine duration in December in Hollis is 4.9h.

What are the months with the lowest UV index in Hollis?

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

What is the UV index reading in December in Hollis?

In Hollis, 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 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
Hollis, NH

Average temperature in December - Hollis, NH
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (30.9°F).

  • Average low temperature in December: 25.7°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in December
Hollis, NH

Average pressure in December - Hollis, NH
  • Average pressure in December: 30.04"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Hollis, NH

Average wind speed in December - Hollis, NH
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in December
Hollis, NH

Average humidity in December - Hollis, NH
  • Average humidity in December: 79%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in December
Hollis, NH

Average rainfall in December - Hollis, NH
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is November (0.79").
The driest month (with the least rainfall) is September (0.28").

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Average rainfall days in December
Hollis, NH

Average rainfall days in December - Hollis, NH
  • Average rainfall days in December: 6.1 days

The month with the highest number of rainy days is June (10.4 days).
The month with the least rainy days is January (3.5 days).

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Average snowfall in December
Hollis, NH

Average snowfall in December - Hollis, NH
  • Average snowfall in December: 1.26"

The months with the highest snowfall are February and December (1.26").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Hollis, NH

Average snowfall days in December - Hollis, NH
  • Average snowfall days in December: 3.8 days

The month with the highest number of snowfall days is February (6.7 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
Hollis, NH

Average daylight in December / Average sunshine in December - Hollis, NH
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Hollis, NH

Average sunshine days in December - Hollis, NH
  • Average sunshine days in December: 21.8 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (17.3 days).

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Average UV index in December
Hollis, NH

Average UV index in December - Hollis, NH
  • Average UV index in December: 2

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

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Average cloud cover in December
Hollis, NH

Average cloud cover in December - Hollis, NH
  • Average cloud cover in December: 47

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in December
Hollis, NH

Average visibility in December - Hollis, NH
  • Average visibility in December: 6mi

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

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Hollis, New Hampshire, USA

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