December weather forecast and climate
Greenville, NH

Weather in December

The first month of the winter, December, is also a wintry month in Greenville, New Hampshire, with temperature in the range of an average high of 33.6°F (0.9°C) and an average low of 23°F (-5°C).

Temperature

In December, the average high-temperature drops, from a frosty 44.8°F (7.1°C) in November, to a wintry 33.6°F (0.9°C). The average low-temperature, in Greenville, is 23°F (-5°C).

Humidity

The average relative humidity in Greenville is 81%.

Rainfall

In Greenville, during December, the rain falls for 7.5 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Greenville, there are 113.8 rainfall days, and 12.44" (316mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Greenville. In Greenville, during 7.5 snowfall days, 3.03" (77mm) of snow is typically accumulated. Throughout the year, there are 45.3 snowfall days, and 18.78" (477mm) of snow is accumulated.

Daylight

With an average of 9.1h of daylight, December has the shortest days of the year in Greenville.

Sunshine

In December, the average sunshine in Greenville is 4.6h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Greenville. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Greenville?

In December, in Greenville, the average high-temperature is 33.6°F (0.9°C), and the average low-temperature is 23°F (-5°C).

What is the average humidity in December in Greenville?

In December, the average relative humidity in Greenville, New Hampshire, is 81%.

How many days does it rain in December in Greenville?

In December, the rain falls for 7.5 days. Throughout December, 1.02" (26mm) of precipitation is accumulated.

How many days does it snow in December in Greenville?

In December, in Greenville, it is snowing for 7.5 days. Throughout December, 3.03" (77mm) of snow is accumulated.

What is the month with the shortest days in Greenville?

With an average of 9.1h of daylight, December has the shortest days of the year in Greenville.

How many hours of daylight does Greenville have in December?

The average length of the day in December in Greenville, New Hampshire, is 9.1h.

How many hours of sunshine does Greenville have in December?

The average sunshine in December in Greenville, New Hampshire, is 4.6h.

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

Months with the lowest UV index in Greenville, New Hampshire, are January through March, October through December, with an average maximum UV index of 2.

What is the UV index reading in December in Greenville?

In December, the average daily maximum UV index in Greenville is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in December
Greenville, NH

Average temperature in December - Greenville, NH
  • Average high temperature in December: 33.6°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in December: 23°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 (16°F).

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Average pressure in December
Greenville, NH

Average pressure in December - Greenville, NH
  • Average pressure in December: 30.04"

The month with the highest atmospheric pressure is November (30.07").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in December
Greenville, NH

Average wind speed in December - Greenville, NH
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in December
Greenville, NH

Average humidity in December - Greenville, NH
  • Average humidity in December: 81%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Greenville, NH

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

The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is September (0.71").

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Average rainfall days in December
Greenville, NH

Average rainfall days in December - Greenville, NH
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (4.2 days).

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Average snowfall in December
Greenville, NH

Average snowfall in December - Greenville, NH
  • Average snowfall in December: 3.03"

The month with the highest snowfall is November (3.9").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Greenville, NH

Average snowfall days in December - Greenville, NH
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is February (9.7 days).
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
Greenville, NH

Average daylight in December / Average sunshine in December - Greenville, NH
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 4.6h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.4h).

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Average sunshine days in December
Greenville, NH

Average sunshine days in December - Greenville, NH
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is June (14.3 days).

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Average UV index in December
Greenville, NH

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in December
Greenville, NH

Average cloud cover in December - Greenville, NH
  • Average cloud cover in December: 51

The month with the most cloud cover is March (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 36).

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Average visibility in December
Greenville, NH

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

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

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