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
With December's onset, the average high-temperature recedes from November's wintry 42.1°F (5.6°C) to a subzero cold 31.1°F (-0.5°C). Throughout December, the nighttime temperature averages to a still freezing cold 20.5°F (-6.4°C).Humidity
The average relative humidity in December is 83%.Rainfall
In Harkness, in December, during 6.4 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Harkness, during the entire year, the rain falls for 106.7 days and collects up to 8.9" (226mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Harkness, in December, during 8.4 snowfall days, 1.22" (31mm) of snow is typically accumulated. In Harkness, New York, during the entire year, snow falls for 47.4 days and aggregates up to 7.32" (186mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:24 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 1 during December leads to these instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Harkness have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Harkness, NY
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Harkness, NY
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Harkness, NY
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Harkness, NY
- Average humidity in December: 83%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is May (74%).
Average rainfall in December
Harkness, NY
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is August (1.18").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Harkness, NY
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in December
Harkness, NY
- Average snowfall in December: 1.22"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harkness, NY
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harkness, NY
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in December
Harkness, NY
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is July (15.1 days).
Average UV index in December
Harkness, NY
- Average UV index in December: 1
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 and December (UV index 1).
Average cloud cover in December
Harkness, NY
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Harkness, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, May, July, August, November and December (6mi).
The months with the lowest visibility are January, February, March, June, September and October (5mi).
Harkness, New York, USA
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