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
The average high-temperature slightly decreases in December, shifting from a fresh 51.6°F (10.9°C) in November to a chilly 43.5°F (6.4°C). Hewlett documents a consistent average low-temperature of 36°F (2.2°C) at night during December.Humidity
The average relative humidity in December in Hewlett is 75%.Rainfall
In Hewlett, in December, during 10.7 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, there are 135.3 rainfall days, and 18.62" (473mm) of precipitation is accumulated.Snowfall
January through March, October through December are months with snowfall. In Hewlett, during December, snow falls for 2.8 days and regularly aggregates up to 0.59" (15mm) of snow. In Hewlett, during the entire year, snow falls for 15.8 days and aggregates up to 2.95" (75mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December in Hewlett, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:37 pm EST.
Sunshine
In December, the average sunshine in Hewlett is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Hewlett, New York. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is December in Hewlett?
What is the average humidity in December in Hewlett?
How many days does it rain in December in Hewlett?
How many days does it snow in December in Hewlett?
What is the month with the shortest days in Hewlett?
How many hours of daylight does Hewlett have in December?
When are sunrise and sunset in December in Hewlett?
How long on average sun shines in December in Hewlett?
What are the months with the lowest UV index in Hewlett?
What is the UV index reading in December in Hewlett?
Average temperature in December
Hewlett, NY
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 36°F
The month with the highest average low temperature is August (71.1°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in December
Hewlett, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Hewlett, NY
- Average wind speed in December: 11.9mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in December
Hewlett, NY
- Average humidity in December: 75%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (72%).
Average rainfall in December
Hewlett, NY
- Average rainfall in December: 1.65"
The wettest months (with the highest rainfall) are July and August (2.32").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in December
Hewlett, NY
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Hewlett, NY
- Average snowfall in December: 0.59"
The month with the highest snowfall is March (1.02").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Hewlett, NY
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hewlett, NY
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Hewlett, NY
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is July (13.6 days).
Average UV index in December
Hewlett, NY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Hewlett, NY
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Hewlett, NY
- 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).
Hewlett, New York, USA
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