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
December implies a gentle temperature shift, with average high-temperatures reducing from November's fresh 50.4°F (10.2°C) to a wintry 40.1°F (4.5°C). In Thornwood, the expected average low-temperature for December is a freezing cold 30.2°F (-1°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 78%.Rainfall
In Thornwood, during December, the rain falls for 9.4 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Thornwood, during the entire year, the rain falls for 144.6 days and collects up to 25.51" (648mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 3.2 days. Throughout December, 1.89" (48mm) of snow is accumulated. Throughout the year, in Thornwood, there are 20.6 snowfall days, and 10.12" (257mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:36 pm EST.
Sunshine
The average sunshine in December in Thornwood is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 2 during December translates into the following directions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Thornwood during December?
What are the most humid months in Thornwood?
What is the average humidity in December in Thornwood?
How many days does it rain in December in Thornwood?
How many days does it snow in December in Thornwood?
What is the month with the shortest days in Thornwood?
What is the average length of the day in December in Thornwood?
When is the sunrise / sunset in December in Thornwood?
How long on average sun shines in December in Thornwood?
What are the months with the lowest UV index in Thornwood?
What is the UV index reading in December in Thornwood?
Average temperature in December
Thornwood, NY
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Thornwood, 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
Thornwood, NY
- Average wind speed in December: 7.5mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Thornwood, NY
- Average humidity in December: 78%
The months with the highest relative humidity are February and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in December
Thornwood, NY
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is July (2.87").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in December
Thornwood, NY
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (6 days).
Average snowfall in December
Thornwood, NY
- Average snowfall in December: 1.89"
The month with the highest snowfall is March (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Thornwood, NY
- Average snowfall days in December: 3.2 days
The month with the highest number of snowfall days is February (5.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Thornwood, NY
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Thornwood, NY
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (20 days).
The months with the least sunshine days are June and July (12.3 days).
Average UV index in December
Thornwood, 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
Thornwood, NY
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Thornwood, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Thornwood, New York, USA
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