December weather forecast
Altona, NY

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Weather in December

December, the first month of the winter in Altona, is also a subzero cold month, with an average temperature varying between 19.6°F (-6.9°C) and 29.3°F (-1.5°C).

Temperature

The onset of December results in a decrease in the average high-temperature, receding from an icy 41.7°F (5.4°C) in November to a subzero cold 29.3°F (-1.5°C). An average low-temperature of 19.6°F (-6.9°C) is observed during December nights in Altona.

Humidity

In Altona, the average relative humidity in December is 86%.

Rainfall

In December, the rain falls for 7.9 days. Throughout December, 1.97" (50mm) of precipitation is accumulated. In Altona, during the entire year, the rain falls for 146.4 days and collects up to 27.36" (695mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Altona. In December, in Altona, it is snowing for 15.2 days. Throughout December, 5.98" (152mm) of snow is accumulated. In Altona, during the entire year, snow falls for 76.4 days and aggregates up to 37.52" (953mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 54min of daylight.
On the first day of December in Altona, New York, sunrise is at 7:12 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:23 pm EST.

Sunshine

In Altona, the average sunshine in December is 3.2h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 1 in December converts into the following recommendations:
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. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
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Frequently asked questions

How cold is December in Altona?

In Altona, in December, the average high-temperature is 29.3°F (-1.5°C), and the average low-temperature is 19.6°F (-6.9°C).

What is the average humidity in December in Altona?

In Altona, New York, the average relative humidity in December is 86%.

How many days does it rain in December in Altona?

In December, in Altona, New York, the rain falls for 7.9 days. Throughout December, 1.97" (50mm) of precipitation is accumulated.

How much does it snow in Altona in December?

In Altona, during December, snow falls for 15.2 days and regularly aggregates up to 5.98" (152mm) of snow.

What is the month with the shortest days in Altona?

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

How many hours of daylight does Altona have in December?

The average day length in December in Altona is 8h and 51min.

When is the sunrise / sunset in December in Altona?

In December, on the first day of the month, sunrise is at 7:12 am and sunset at 4:14 pm. On the last day of the month, in Altona, sunrise is at 7:32 am and sunset at 4:23 pm EST.

How many hours of sunshine does Altona have in December?

In December, the average sunshine duration in Altona, New York, is 3.2h.

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

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Altona.

How high is the UV index in December in Altona?

In Altona, the average daily maximum UV index in December is 1. A UV Index value 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
Altona, NY

Average temperature in December - Altona, NY
  • Average high temperature in December: 29.3°F

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (23.5°F).

  • Average low temperature in December: 19.6°F

The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).

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Average pressure in December
Altona, NY

Average pressure in December - Altona, NY
  • Average pressure in December: 30.04"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in December
Altona, NY

Average wind speed in December - Altona, NY
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in December
Altona, NY

Average humidity in December - Altona, NY
  • Average humidity in December: 86%

The months with the highest relative humidity are January and February (89%).
The months with the lowest relative humidity are April and May (76%).

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Average rainfall in December
Altona, NY

Average rainfall in December - Altona, NY
  • Average rainfall in December: 1.97"

The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is January (1.54").

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Average rainfall days in December
Altona, NY

Average rainfall days in December - Altona, NY
  • Average rainfall days in December: 7.9 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in December
Altona, NY

Average snowfall in December - Altona, NY
  • Average snowfall in December: 5.98"

The month with the highest snowfall is February (8.43").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Altona, NY

Average snowfall days in December - Altona, NY
  • Average snowfall days in December: 15.2 days

The month with the highest number of snowfall days is February (17.1 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
Altona, NY

Average daylight in December / Average sunshine in December - Altona, NY
  • 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 1min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).

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Average sunshine days in December
Altona, NY

Average sunshine days in December - Altona, NY
  • Average sunshine days in December: 11.3 days

The month with the most sunshine days is November (16 days).
The month with the least sunshine days is June (9.1 days).

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Average UV index in December
Altona, NY

Average UV index in December - Altona, NY
  • 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, February and December (UV index 1).

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Average cloud cover in December
Altona, NY

Average cloud cover in December - Altona, NY
  • Average cloud cover in December: 66

The month with the most cloud cover is February (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in December
Altona, NY

Average visibility in December - Altona, NY
  • Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (4mi).

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Altona, New York, USA

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