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 decreases from a frosty 46°F (7.8°C) in November to an icy 35.4°F (1.9°C). Throughout the month of December, Hillsdale witnesses an average temperature of 24.4°F (-4.2°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Hillsdale, in December, it is raining for 8.5 days, with typically 1.54" (39mm) of accumulated precipitation. In Hillsdale, during the entire year, the rain falls for 139.3 days and collects up to 21.06" (535mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, in Hillsdale, it is snowing for 5.9 days. Throughout December, 2.95" (75mm) of snow is accumulated. In Hillsdale, during the entire year, snow falls for 37.3 days and aggregates up to 15.79" (401mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:03 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:32 pm EST.
Sunshine
The average sunshine in December is 4.5h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 in December translates into these instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Hillsdale, NY
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in December
Hillsdale, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Hillsdale, NY
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Hillsdale, NY
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Hillsdale, NY
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Hillsdale, NY
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Hillsdale, NY
- Average snowfall in December: 2.95"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hillsdale, NY
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hillsdale, NY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in December
Hillsdale, NY
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in December
Hillsdale, NY
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Hillsdale, NY
- Average cloud cover in December: 52
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in December
Hillsdale, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
Hillsdale, New York, USA
Weather forecast for your location
2. Allow the app to use your location