December weather forecast and climate
Jackson, NH

The first month of the winter, December, is still a freezing cold month in Jackson, New Hampshire, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 29.3°F (-1.5°C).

Temperature

In December, the average high-temperature drops, from a wintry 40.8°F (4.9°C) in November, to a freezing cold 29.3°F (-1.5°C). In Jackson, the average low-temperature is 18.9°F (-7.3°C).

Humidity

The average relative humidity is 83%.

Rainfall

In Jackson, during 5.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. In Jackson, during the entire year, the rain falls for 90.5 days and collects up to 11.61" (295mm) of precipitation.

Snowfall

Months with snowfall in Jackson are January through May, October through December. In Jackson, during 8.3 snowfall days, 2.76" (70mm) of snow is typically accumulated. In Jackson, New Hampshire, during the entire year, snow falls for 41.7 days, and aggregates up to 19.96" (507mm) of snow.

Daylight

With an average of 8.9h of daylight, December has the shortest days of the year in Jackson, New Hampshire.

Sunshine

In December, the average sunshine is 4.5h.

UV index

Months with the lowest UV index in Jackson, New Hampshire, are February and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 1 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Jackson?

The average high-temperature, in December, in Jackson, New Hampshire, is 29.3°F (-1.5°C), while the average low-temperature is 18.9°F (-7.3°C).

What is the average humidity in December in Jackson?

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

How many days does it rain in December in Jackson?

In Jackson, New Hampshire, in December, it is raining for 5.8 days, with typically 1.02" (26mm) of accumulated precipitation.

How much does it snow in Jackson in December?

In Jackson, in December, snow falls for 8.3 days, with typically accumulated 2.76" (70mm) of snow.

What is the month with the shortest days in Jackson?

The month with the shortest days in Jackson is December, with an average of 8.9h of daylight.

How many hours of daylight does Jackson have in December?

The average length of the day in December in Jackson, New Hampshire, is 8.9h.

How long on average sun shines in December in Jackson?

In Jackson, New Hampshire, the average sunshine in December is 4.5h.

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

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

What is the UV index intensity in December in Jackson?

The average daily maximum UV index in December in Jackson is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Jackson, NH
  • Average high temperature in December: 29.3°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in December: 18.9°F

The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

Average pressure in December - Jackson, NH
  • Average pressure in December: 30.03"

The month with the highest atmospheric pressure is November (30.06").
The month with the lowest atmospheric pressure is June (29.91").

Average wind speed in December - Jackson, NH
  • Average wind speed in December: 7mph

The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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

Months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (77%).

Average rainfall in December - Jackson, NH
  • Average rainfall in December: 1.02"

The wettest months (with the highest rainfall) are April and October (1.46").
The driest month (with the least rainfall) is September (0.39").

Average rainfall days in December - Jackson, NH
  • Average rainfall days in December: 5.8 days

Months with the highest number of rainy days are May and July (10.3 days).
The month with the least rainy days is February (3.7 days).

Average snowfall in December - Jackson, NH
  • Average snowfall in December: 2.76"

The month with the highest snowfall is February (4.53").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in December - Jackson, NH
  • Average snowfall days in December: 8.3 days

The month with the highest number of snowfall days is February (8.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Jackson, NH
  • Average daylight in December: 8.9h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in December: 4.5h

The month with the most sunshine is August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.2h).

Average sunshine days in December - Jackson, NH
  • Average sunshine days in December: 19.8 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (18.2 days).

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

Months with the highest UV index are 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 - Jackson, NH
  • Average cloud cover in December: 53

The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 38).

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

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