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
In December, the average high-temperature goes from a fresh 50.5°F (10.3°C) in November to a wintry 41°F (5°C). The average low-temperature, in December, is a freezing cold 30.9°F (-0.6°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 77%.Rainfall
In Hartsdale, New York, in December, during 9.3 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 132.4 rainfall days, and 15.63" (397mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 3.4 days. Throughout December, 1.06" (27mm) of snow is accumulated. Throughout the year, there are 18.9 snowfall days, and 5.08" (129mm) of snow is accumulated.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 Hartsdale, sunrise is at 7:01 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:37 pm EST.
Sunshine
The average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Hartsdale, New York, are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Hartsdale in December?
What are the most humid months in Hartsdale?
What is the average humidity in December in Hartsdale?
How much does it rain in Hartsdale in December?
How many days does it snow in December in Hartsdale?
What is the month with the shortest days in Hartsdale?
What is the average length of the day in December in Hartsdale?
When is the sunrise / sunset in December in Hartsdale?
How many hours of sunshine does Hartsdale have in December?
What is the month with the lowest UV index in Hartsdale?
What is the UV index reading in December in Hartsdale?
Average temperature in December
Hartsdale, NY
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in December
Hartsdale, 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
Hartsdale, NY
- Average wind speed in December: 7.9mph
The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in December
Hartsdale, NY
- Average humidity in December: 77%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
Hartsdale, NY
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in December
Hartsdale, NY
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in December
Hartsdale, NY
- Average snowfall in December: 1.06"
The month with the highest snowfall is March (1.65").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Hartsdale, NY
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is February (5.2 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
Hartsdale, 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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Hartsdale, NY
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in December
Hartsdale, 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
Hartsdale, 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
Hartsdale, 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).
Hartsdale, New York, USA
Weather forecast for your location
2. Allow the app to use your location