December weather forecast
Goffstown, NH

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Weather in December

December marks the peak of winter with temperatures plunging to an average low of 23.9°F (-4.5°C). The city witnesses substantial snowfall, recording an average of 5.16" (131mm). The longer nights, heavy cloud cover, and strikingly low temperatures make December the quintessential winter month. Despite the short daylight hours, the snow provides a reflective blanket that illuminously lights up the city even in the brief periods of sunshine.

Temperature

The commencement of December indicates a shift in the average high-temperature, receding from November's frosty 45.9°F (7.7°C) to a wintry 34.9°F (1.6°C). During December nights, Goffstown records an average temperature of 23.9°F (-4.5°C).

Humidity

The average relative humidity in December in Goffstown is 80%.

Rainfall

In December, the rain falls for 9.6 days. Throughout December, 2.52" (64mm) of precipitation is accumulated. In Goffstown, during the entire year, the rain falls for 138.6 days and collects up to 26.18" (665mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Goffstown, during December, snow falls for 7.4 days and regularly aggregates up to 5.16" (131mm) of snow. In Goffstown, during the entire year, snow falls for 42 days and aggregates up to 25.83" (656mm) of snow.

Daylight

The month with the shortest days in Goffstown is December, with an average of 9h and 6min of daylight.
On the first day of December, sunrise is at 6:58 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:21 pm EST.

Sunshine

In December, the average sunshine is 4.7h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 2 during December leads to these advisories:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

During December, Goffstown experiences an average high-temperature of 34.9°F (1.6°C) and a low-temperature of 23.9°F (-4.5°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in July is estimated at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 80%.

How much does it rain in December?

In Goffstown, during December, the rain falls for 9.6 days and regularly aggregates up to 2.52" (64mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 7.4 days. Throughout December, 5.16" (131mm) of snow is accumulated.

What is the month with the shortest days?

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 December, the average day length in Goffstown is 9h and 4min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 6:58 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:21 pm EST.

How many hours of sunshine does Goffstown have in December?

The average sunshine duration in December is 4.7h.

What are the months with the lowest UV index?

The 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 Goffstown, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
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
Goffstown, NH

Average temperature in December - Goffstown, NH
  • Average high temperature in December: 34.9°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (29.5°F).

  • Average low temperature in December: 23.9°F

The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

Average pressure in December
Goffstown, NH

Average pressure in December - Goffstown, NH
  • Average pressure in December: 30.03"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).

Average wind speed in December
Goffstown, NH

Average wind speed in December - Goffstown, NH
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in December
Goffstown, NH

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

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Goffstown, NH

Average rainfall in December - Goffstown, NH
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.46").

Average rainfall days in December
Goffstown, NH

Average rainfall days in December - Goffstown, NH
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (6.6 days).

Average snowfall in December
Goffstown, NH

Average snowfall in December - Goffstown, NH
  • Average snowfall in December: 5.16"

The month with the highest snowfall is February (6.85").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Goffstown, NH

Average snowfall days in December - Goffstown, NH
  • Average snowfall days in December: 7.4 days

The month with the highest number of snowfall days is January (10.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Goffstown, 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 4min

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 30min).

Average sunshine days in December
Goffstown, NH

Average sunshine days in December - Goffstown, NH
  • Average sunshine days in December: 16.5 days

The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is March (12.9 days).

Average UV index in December
Goffstown, NH

Average UV index in December - Goffstown, 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, March, November and December (UV index 2).

Average cloud cover in December
Goffstown, NH

Average cloud cover in December - Goffstown, NH
  • Average cloud cover in December: 48

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 34).

Average visibility in December
Goffstown, NH

Average visibility in December - Goffstown, NH
  • Average visibility in December: 5mi

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

Goffstown, New Hampshire, USA

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