December weather forecast
Andover, NH

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Weather in December

The first month of the winter, December, is still a freezing cold month in Andover, New Hampshire, with an average temperature fluctuating between 31.5°F (-0.3°C) and 21°F (-6.1°C).

Temperature

Andover's progression into December involves a drop in the average high-temperature, receding from a frosty 43.2°F (6.2°C) in November to a freezing cold 31.5°F (-0.3°C). In the month of December, Andover witnesses a consistent average low-temperature of 21°F (-6.1°C).

Humidity

In December, the average relative humidity in Andover is 82%.

Rainfall

In Andover, in December, it is raining for 5.6 days, with typically 1.06" (27mm) of accumulated precipitation. Throughout the year, there are 103.3 rainfall days, and 12.52" (318mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Andover. In December, it is snowing for 8.2 days. Throughout December, 3.19" (81mm) of snow is accumulated. Throughout the year, in Andover, New Hampshire, there are 43.2 snowfall days, and 14.49" (368mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 0min of daylight.
On the first day of December, sunrise is at 7:00 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:21 pm EST.

Sunshine

The average sunshine in December in Andover, New Hampshire, is 4.3h.

UV index

The months with the lowest UV index in Andover are February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold is it in Andover in December?

In December, the average high-temperature and low-temperature in Andover, New Hampshire, are 31.5°F (-0.3°C) and 21°F (-6.1°C) respectively.

What is the average humidity in December in Andover?

In Andover, New Hampshire, the average relative humidity in December is 82%.

How much does it rain in Andover in December?

In Andover, in December, during 5.6 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

How much does it snow in Andover in December?

In Andover, in December, during 8.2 snowfall days, 3.19" (81mm) of snow is typically accumulated.

What is the month with the shortest days in Andover?

The month with the shortest days in Andover is December, with an average of 9h and 0min of daylight.

How many hours of daylight does Andover have in December?

In December, the average day length is 9h and 1min.

When is the sunrise / sunset in December in Andover?

On the first day of December, sunrise is at 7:00 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:21 pm EST.

How long on average sun shines in December in Andover?

In December, the average sunshine duration in Andover is 4.3h.

What is the month with the lowest UV index in Andover?

The months with the lowest UV index in Andover, New Hampshire, are February and December, with an average maximum UV index of 1.

What is the UV index reading in December in Andover?

The average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health risk 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
Andover, NH

Average temperature in December - Andover, NH
  • Average high temperature in December: 31.5°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (25.9°F).

  • Average low temperature in December: 21°F

The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

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Average pressure in December
Andover, NH

Average pressure in December - Andover, 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 (29.91"Hg).

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Average wind speed in December
Andover, NH

Average wind speed in December - Andover, NH
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in December
Andover, NH

Average humidity in December - Andover, NH
  • Average humidity in December: 82%

The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).

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Average rainfall in December
Andover, NH

Average rainfall in December - Andover, NH
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is October (1.54").
The driest month (with the least rainfall) is January (0.71").

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Average rainfall days in December
Andover, NH

Average rainfall days in December - Andover, NH
  • Average rainfall days in December: 5.6 days

The month with the highest number of rainy days is July (11.6 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in December
Andover, NH

Average snowfall in December - Andover, NH
  • Average snowfall in December: 3.19"

The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Andover, NH

Average snowfall days in December - Andover, NH
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is February (10.1 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
Andover, NH

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

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

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Average sunshine days in December
Andover, NH

Average sunshine days in December - Andover, NH
  • Average sunshine days in December: 19 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is February (16.1 days).

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Average UV index in December
Andover, NH

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

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

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Average cloud cover in December
Andover, NH

Average cloud cover in December - Andover, NH
  • Average cloud cover in December: 54

The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 36).

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Average visibility in December
Andover, NH

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

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

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Andover, New Hampshire, USA

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