December weather forecast
Somersworth, NH

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Weather in December

Somersworth experiences the full brunt of winter in December. From highs of 33.4°F (0.8°C) in November, temperatures drop significantly, plunging to a chilly average low of 24.6°F (-4.1°C). Against the backdrop of a crisp winter sky, chimneys puff away, offering a stark contrast to the winter's cold. Yet, despite the frigid conditions, the holiday spirit pervades, rendering a magical, almost ethereal quality to the city, as it wraps up another year under a blanket of gleaming snow.

Temperature

Somersworth's December weather features a mild decline in high-temperatures, reducing from a chilly 46°F (7.8°C) in November to a wintry 35.6°F (2°C). December in Somersworth generally records an average low-temperature of 24.6°F (-4.1°C).

Humidity

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

Rainfall

The months with the most rainfall are October and December, with an average 3.11" (79mm) of precipitation.

Snowfall

Months with snowfall in Somersworth, New Hampshire, are January through May, October through December. The month with the most snowfall in Somersworth is December, when snow falls for 7.2 days and typically aggregates up to 6.69" (170mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 0min of daylight.
On the first day of the month, sunrise is at 6:56 am and sunset at 4:09 pm. On the last day of December, sunrise is at 7:15 am and sunset at 4:18 pm EST.

Sunshine

In December, the average sunshine is 4.8h.

UV index

The months with the lowest UV index in Somersworth, New Hampshire, are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 2 during December leads to these advisories:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

How cold is December in Somersworth?

In Somersworth, 35.6°F (2°C) is the average high-temperature and 24.6°F (-4.1°C) is the average low-temperature during December.

What is the average humidity in December in Somersworth?

In December, the average relative humidity is 80%.

What is the wettest month in Somersworth?

The wettest months in Somersworth, New Hampshire, are October and December, with an average 3.11" (79mm) of rainfall.

How many days does it rain in December in Somersworth?

In Somersworth, New Hampshire, in December, during 10 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

What is the snowiest month in Somersworth?

The month with the most snowfall in Somersworth, New Hampshire, is December, when snow falls for 7.2 days and typically aggregates up to 6.69" (170mm) of snow.

How much does it snow in Somersworth in December?

In Somersworth, New Hampshire, in December, during 7.2 snowfall days, 6.69" (170mm) of snow is typically accumulated.

What is the month with the shortest days in Somersworth?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Somersworth, New Hampshire.

How many hours of daylight does Somersworth have in December?

In December, the average day length in Somersworth, New Hampshire, is 9h and 2min.

When are sunrise and sunset in December in Somersworth?

In December, on the first day of the month, sunrise is at 6:56 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:18 pm EST.

How long on average sun shines in December in Somersworth?

In Somersworth, the average sunshine duration in December is 4.8h.

When is the lowest UV index in Somersworth?

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

What is the UV index reading in December in Somersworth?

In Somersworth, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat 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
Somersworth, NH

Average temperature in December - Somersworth, NH
  • Average high temperature in December: 35.6°F

The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 24.6°F

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure in December
Somersworth, NH

Average pressure in December - Somersworth, 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 (29.92"Hg).

Average wind speed in December
Somersworth, NH

Average wind speed in December - Somersworth, NH
  • Average wind speed in December: 8.5mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in December
Somersworth, NH

Average humidity in December - Somersworth, NH
  • Average humidity in December: 80%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is April (75%).

Average rainfall in December
Somersworth, NH

Average rainfall in December - Somersworth, NH
  • Average rainfall in December: 3.11"

The wettest months (with the highest rainfall) are October and December (3.11").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in December
Somersworth, NH

Average rainfall days in December - Somersworth, NH
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is February (6.8 days).

Average snowfall in December
Somersworth, NH

Average snowfall in December - Somersworth, NH
  • Average snowfall in December: 6.69"

The month with the highest snowfall is December (6.69").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Somersworth, NH

Average snowfall days in December - Somersworth, NH
  • Average snowfall days in December: 7.2 days

The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Somersworth, NH
  • Average daylight in December: 9h and 0min

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 0min).

  • 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 42min).

Average sunshine days in December
Somersworth, NH

Average sunshine days in December - Somersworth, NH
  • Average sunshine days in December: 16.1 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.3 days).

Average UV index in December
Somersworth, NH

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

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

Average cloud cover in December
Somersworth, NH

Average cloud cover in December - Somersworth, 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 32).

Average visibility in December
Somersworth, NH

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

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

Somersworth, New Hampshire, USA

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