United StatesThe weather in December in Long Island
It's cold in December in Long Island with an average temperature of 4°C. Temperatures this month range from a low of 0°C to a high of 9°C. At night, you can expect temperatures between -7°C and 0°C.
Looking for sun? December isn’t a good month to be in Long Island. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Long Island, Maine. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 17°C in 2015, Long Island reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was -15°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of -26°C to a highest value of 10°C.
Water temperature
The water temperature at Long Island is 7°C this month. This is too cold to swim without protective gear.
Precipitation and snowfall
In December, there is an average of 126 mm of precipitation, spread over 16 days. Of the total precipitation, about 22 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in December for Long Island
Click on any day in December to get detailed info about the usual weather on that day in Long Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Long Island | New York | |
|---|---|---|
| Average temperature | 4°C | 9°C |
| Max. temperature | 9°C | 12°C |
| Min. temperature | -7°C | -5°C |
| Total precipitation | 126 mm | 133 mm |
| Rainy days | 16 days | 17 days |
| Total snowfall | 22 cm | 9,7 cm |
| Snowy days | 10 days | 3 days |
Start of December
The month of December starts in Long Island with cold temps, averaging around 6°C during the day and nights around -2°C.
Mid December
By mid-December, daytime temps drop to around 4°C, with nights around -4°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of December
By the end of December, the average daytime temperature in Long Island is around 4°C, while nighttime temps are about -4°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Check out the climate of Long Island for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in December in Long Island, Maine. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Long Island
Temperature in December in Long Island over the years
Precipitation charts
These charts show the average amount of precipitation in December in Long Island, Maine. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Long Island
Total precipitation in December in Long Island over the years
Daily Snowfall in December in Long Island
Snowfall in December in Long Island per year
Daily UV index in December in Long Island
This chart shows the average daily UV index in December in Long Island, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Long Island
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Average weather in Long Island by month
Click on a month below to see detailed weather info for Long Island. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.