December weather forecast
South Hero, VT

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Weather in December

December, the first month of the winter in South Hero, is also a subzero cold month, with temperature in the range of an average low of 20.8°F (-6.2°C) and an average high of 30.7°F (-0.7°C).

Temperature

A moderate decline in the average high-temperature is seen during December, decreasing from an icy 42.1°F (5.6°C) in November to a freezing cold 30.7°F (-0.7°C). Throughout December, a steady low-temperature average of 20.8°F (-6.2°C) is noted.

Humidity

In South Hero, Vermont, the average relative humidity in December is 83%.

Rainfall

In South Hero, in December, during 12.3 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. Throughout the year, there are 175.6 rainfall days, and 29.09" (739mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, in South Hero, Vermont, it is snowing for 16.6 days. Throughout December, 6.18" (157mm) of snow is accumulated. Throughout the year, in South Hero, there are 84 snowfall days, and 36.5" (927mm) of snow is accumulated.

Daylight

The month with the shortest days in South Hero is December, with an average of 8h and 54min of daylight.
On the first day of December, sunrise is at 7:10 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:22 pm EST.

Sunshine

In December, the average sunshine is 3.7h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum UV index of 1 in December translates into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

How cold is it in South Hero in December?

In South Hero, in December, the average high-temperature is 30.7°F (-0.7°C), and the average low-temperature is 20.8°F (-6.2°C).

What is the average humidity in December in South Hero?

The average relative humidity in December is 83%.

How much does it rain in South Hero in December?

In December, in South Hero, Vermont, the rain falls for 12.3 days. Throughout December, 2.17" (55mm) of precipitation is accumulated.

How many days does it snow in December in South Hero?

In December, it is snowing for 16.6 days. Throughout December, 6.18" (157mm) of snow is accumulated.

What is the month with the shortest days in South Hero?

With an average of 8h and 54min of daylight, December has the shortest days of the year in South Hero, Vermont.

What is the average length of the day in December in South Hero?

In South Hero, the average day length in December is 8h and 53min.

When are sunrise and sunset in December in South Hero?

On the first day of December in South Hero, Vermont, sunrise is at 7:10 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:22 pm EST.

How many hours of sunshine does South Hero have in December?

In December, the average sunshine duration in South Hero is 3.7h.

When is the lowest UV index in South Hero?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in South Hero, Vermont.

What is the UV index reading in December in South Hero?

In December, the average daily maximum UV index in South Hero is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
South Hero, VT

Average temperature in December - South Hero, VT
  • Average high temperature in December: 30.7°F

The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (24.6°F).

  • Average low temperature in December: 20.8°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

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Average pressure in December
South Hero, VT

Average pressure in December - South Hero, VT
  • 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
South Hero, VT

Average wind speed in December - South Hero, VT
  • Average wind speed in December: 7.2mph

The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in December
South Hero, VT

Average humidity in December - South Hero, VT
  • Average humidity in December: 83%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and May (76%).

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Average rainfall in December
South Hero, VT

Average rainfall in December - South Hero, VT
  • Average rainfall in December: 2.17"

The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is February (1.77").

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Average rainfall days in December
South Hero, VT

Average rainfall days in December - South Hero, VT
  • Average rainfall days in December: 12.3 days

The month with the highest number of rainy days is June (19.5 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in December
South Hero, VT

Average snowfall in December - South Hero, VT
  • Average snowfall in December: 6.18"

The month with the highest snowfall is February (9.41").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
South Hero, VT

Average snowfall days in December - South Hero, VT
  • Average snowfall days in December: 16.6 days

The month with the highest number of snowfall days is January (19.7 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
South Hero, VT

Average daylight in December / Average sunshine in December - South Hero, VT
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in December: 3h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).

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Average sunshine days in December
South Hero, VT

Average sunshine days in December - South Hero, VT
  • Average sunshine days in December: 7.6 days

The month with the most sunshine days is September (14.1 days).
The month with the least sunshine days is February (6.8 days).

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Average UV index in December
South Hero, VT

Average UV index in December - South Hero, VT
  • Average UV index in December: 1

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

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Average cloud cover in December
South Hero, VT

Average cloud cover in December - South Hero, VT
  • Average cloud cover in December: 63

The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
South Hero, VT

Average visibility in December - South Hero, VT
  • Average visibility in December: 5mi

The months with the highest visibility are May, June, July and August (6mi).
The months with the lowest visibility are January and February (4mi).

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South Hero, Vermont, USA

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