Normal weather for Long Island in December
It's cold in December in Long Island with an average temperature of 5°C. Temperatures this month range from a low of 3°C to a high of 7°C. At night, you can expect temperatures between -1°C and 3°C.
In December, there is an average of 200 mm of precipitation, spread over 24 days. Of the total precipitation, about 19 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the East.
Long Island in December |
New York | ||
|---|---|---|---|
 Average Temperature |
5°C | 9°C | |
 High Temp |
7°C | 12°C | |
| Low Temp |
3°C | 4°C | |
 Total Precipitation |
200 mm | 133 mm | |
| Rainy Days |
24 days | 17 days | |
 Total Snowfall |
19 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. There are plenty of days with a good chance of precipitation.
With the temperature difference between day and night, it’s smart to wear layers. During the day, wear a thick jacket, sweater, and long pants. For the evening and morning, we recommend a heavy winter coat, sweater, long pants, beanie, and gloves.
Mid December
By mid-December, daytime temps stay steady at around 6°C, with nights around 1°C. There’s a high chance of precipitation during this time.
Since it cools down at night, it’s a good idea to wear layers. During the day, wear a thick jacket, sweater, and long pants. For the evening and morning, we recommend a heavy winter coat, sweater, long pants, beanie, and gloves.
End of December
By the end of December, the average daytime temperature in Long Island is around 5°C, while nighttime temps are about 1°C. There’s a significant chance of many days with precipitation. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
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UV index
The UV index is a maximum of 1 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is December a good time to visit Long Island?
Looking for sun? December isn’t a good month to be in Long Island. There’s too much chance of rain this month.
Temperature records for Long Island in December
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Daily Temperature in December in Long Island
This chart shows the average daily high and low temperatures in December for Long Island, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in Long Island
The chart below shows the average daily precipitation in December for Long Island, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 24 days of precipitation in Long Island.
Daily Snowfall in December in Long Island
This chart shows the average daily snowfall in December in Long Island, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
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.
Temperature in December in Long Island Over the Years
This chart shows the average temperature in December in Long Island, measured in degrees Celsius, over the past few years.
Total Precipitation in December in Long Island Over the Years
This chart shows the average precipitation in December in Long Island, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in December in Long Island per year
This chart shows the average snowfall in December in Long Island, measured in centimeters, over the past few years.
Daily Climate 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.
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.
Or check out the climate of Long Island for all months at once
