Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Long Island witnesses the coldest weather in December, with temperatures averaging a high of 38.1°F (3.4°C) and a low of 34°F (1.1°C).Humidity
The average relative humidity in December is 83%.Rainfall
In Long Island, during December, the rain falls for 17.5 days and regularly aggregates up to 9.02" (229mm) of precipitation. In Long Island, during the entire year, the rain falls for 219.6 days and collects up to 79.29" (2014mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Long Island, in December, snow falls for 9.5 days, with typically accumulated 8.9" (226mm) of snow. Throughout the year, there are 45.8 snowfall days, and 47.48" (1206mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 7h and 18min of daylight.On the first day of December, sunrise is at 7:52 am and sunset at 3:27 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 3:33 pm AKST.
Sunshine
The average sunshine in December is 3.4h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Long Island. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
Is December cold?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Long Island have in December?
When is the sunrise / sunset in December in Long Island?
How many hours of sunshine does Long Island have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Long Island, AK
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is August (59.7°F).
The month with the lowest average high temperature is December (38.1°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is February (33.3°F).
Average pressure in December
Long Island, AK
- Average pressure in December: 29.87"Hg
The month with the highest atmospheric pressure is July (30.06"Hg).
The month with the lowest atmospheric pressure is November (29.79"Hg).
Average wind speed in December
Long Island, AK
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity in December
Long Island, AK
- Average humidity in December: 83%
The month with the highest relative humidity is August (87%).
The month with the lowest relative humidity is March (80%).
Average rainfall in December
Long Island, AK
- Average rainfall in December: 9.02"
The wettest month (with the highest rainfall) is November (9.29").
The driest month (with the least rainfall) is May (2.91").
Average rainfall days in December
Long Island, AK
- Average rainfall days in December: 17.5 days
The month with the highest number of rainy days is October (21.4 days).
The month with the least rainy days is February (13.8 days).
Average snowfall in December
Long Island, AK
- Average snowfall in December: 8.9"
The month with the highest snowfall is March (10.94").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Long Island, AK
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Long Island, AK
- Average daylight in December: 7h and 2min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is May (Average sunshine: 7h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in December
Long Island, AK
- Average sunshine days in December: 8.6 days
The month with the most sunshine days is May (13.6 days).
The month with the least sunshine days is November (5.8 days).
Average UV index in December
Long Island, AK
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Long Island, AK
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are May and September (Cloud cover 54).
Average visibility in December
Long Island, AK
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Long Island, Alaska, USA
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