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 chilly 43.7°F (6.5°C) to a cold 32.9°F (0.5°C). The temperature during December sees a subtle transition from day to night, averaging a low of 24.4°F (-4.2°C).Humidity
In Henderson Harbor, the average relative humidity in December is 84%.Rainfall
In December, the rain falls for 10.2 days. Throughout December, 2.91" (74mm) of precipitation is accumulated. In Henderson Harbor, during the entire year, the rain falls for 158.6 days and collects up to 30.39" (772mm) of precipitation.Snowfall
Months with snowfall in Henderson Harbor are January through May, October through December. December is the month with the most snowfall. Snow falls for 16.4 days and accumulates 9.21" (234mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of December in Henderson Harbor, sunrise is at 7:19 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:37 pm EST.
Sunshine
The average sunshine in December is 2.9h.UV index
The months with the lowest UV index in Henderson Harbor, New York, are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Henderson Harbor in December?
What is the average humidity in December in Henderson Harbor?
How much does it rain in Henderson Harbor in December?
When does it snow the most in Henderson Harbor?
How much does it snow in Henderson Harbor in December?
What is the month with the shortest days in Henderson Harbor?
How many hours of daylight does Henderson Harbor have in December?
When is the sunrise / sunset in December in Henderson Harbor?
How many hours of sunshine does Henderson Harbor have in December?
What are the months with the lowest UV index in Henderson Harbor?
How high is the UV index in December in Henderson Harbor?
Average temperature in December
Henderson Harbor, NY
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in December
Henderson Harbor, NY
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Henderson Harbor, NY
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
Henderson Harbor, NY
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and September (77%).
Average rainfall in December
Henderson Harbor, NY
- Average rainfall in December: 2.91"
The wettest month (with the highest rainfall) is October (3.23").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in December
Henderson Harbor, NY
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is October (17.4 days).
The months with the least rainy days are January and February (7 days).
Average snowfall in December
Henderson Harbor, NY
- Average snowfall in December: 9.21"
The month with the highest snowfall is December (9.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Henderson Harbor, NY
- Average snowfall days in December: 16.4 days
The month with the highest number of snowfall days is January (19 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Henderson Harbor, NY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 2h and 42min).
Average sunshine days in December
Henderson Harbor, NY
- Average sunshine days in December: 7.7 days
The month with the most sunshine days is September (15 days).
The months with the least sunshine days are January and February (7.3 days).
Average UV index in December
Henderson Harbor, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Henderson Harbor, NY
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Henderson Harbor, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Henderson Harbor, New York, USA
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