December weather forecast and climate
Hanover, NH

The first month of the winter, December, is still a freezing cold month in Hanover, New Hampshire, with average temperature ranging between max 30.7°F (-0.7°C) and min 20.8°F (-6.2°C).

Temperature

In December, the average high-temperature decreases, from a wintry 41.9°F (5.5°C) in November, to a subzero cold 30.7°F (-0.7°C). In December, in Hanover, the average low-temperature is 20.8°F (-6.2°C).

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Hanover, during December, the rain falls for 10.9 days and regularly aggregates up to 2.48" (63mm) of precipitation. Throughout the year, in Hanover, New Hampshire, there are 156.9 rainfall days, and 28.23" (717mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Hanover. In Hanover, during December, snow falls for 13.5 days and regularly aggregates up to 6.85" (174mm) of snow. In Hanover, during the entire year, snow falls for 75.5 days, and aggregates up to 40.83" (1037mm) of snow.

Daylight

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

Sunshine

In December, the average sunshine in Hanover is 4h.

UV index

February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 1 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Hanover?

The average high-temperature, in December, in Hanover, New Hampshire, is 30.7°F (-0.7°C), while the average low-temperature is 20.8°F (-6.2°C).

What is the average humidity in December in Hanover?

In December, the average relative humidity in Hanover is 83%.

How many days does it rain in December in Hanover?

In December, in Hanover, the rain falls for 10.9 days. Throughout December, 2.48" (63mm) of precipitation is accumulated.

How much does it snow in Hanover in December?

In Hanover, during December, snow falls for 13.5 days and regularly aggregates up to 6.85" (174mm) of snow.

What is the month with the shortest days in Hanover?

The month with the shortest days is December, with an average of 9h of daylight.

How many hours of daylight does Hanover have in December?

In December, the average length of the day in Hanover is 9h.

How many hours of sunshine does Hanover have in December?

In December, the average sunshine in Hanover is 4h.

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

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

How high is the UV index in December in Hanover?

In December, the average daily maximum UV index in Hanover is 1. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.
Average temperature in December - Hanover, NH
  • Average high temperature in December: -0.7°C

The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-3.9°C).

  • Average low temperature in December: -6.2°C

The month with the highest average low temperature is July (13.6°C).
The coldest month (with the lowest average low temperature) is January (-10.8°C).

Average pressure in December - Hanover, NH
  • Average pressure in December: 1017.4mbar

The month with the highest atmospheric pressure is November (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013mbar).

Average wind speed in December - Hanover, NH
  • Average wind speed in December: 11km/h

The windiest month (with the highest average wind speed) is April (11.9km/h).
The calmest month (with the lowest average wind speed) is August (7.8km/h).

Average humidity in December - Hanover, NH
  • Average humidity in December: 83%

Months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is May (75%).

Average rainfall in December - Hanover, NH
  • Average rainfall in December: 63mm

The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the least rainfall) is September (47mm).

Average rainfall days in December - Hanover, NH
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (7.9 days).

Average snowfall in December - Hanover, NH
  • Average snowfall in December: 174mm

The month with the highest snowfall is February (294mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Hanover, NH
  • Average snowfall days in December: 13.5 days

The month with the highest number of snowfall days is January (16.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Hanover, NH
  • Average daylight in December: 9h

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in December: 4h

The month with the most sunshine is August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 3.6h).

Average sunshine days in December - Hanover, NH
  • Average sunshine days in December: 12.3 days

The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is February (9.8 days).

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

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

Average cloud cover in December - Hanover, NH
  • Average cloud cover in December: 59

The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 37).

Average visibility in December - Hanover, NH
  • Average visibility in December: 8km

Months with the highest visibility are April, May, June, July, August, October, November and December (8km).
Months with the lowest visibility are January, February, March and September (7km).