December weather forecastThreemile Harbor, NY
December
Weather in December
December, the first month of the winter in Threemile Harbor, is also a frosty month, with an average temperature fluctuating between 38.1°F (3.4°C) and 45.1°F (7.3°C).Temperature
A mild drop in Threemile Harbor's average high-temperature is observed in December, transitioning from a cool 52.5°F (11.4°C) in November to a frosty 45.1°F (7.3°C). Recording a slight decline in temperature during the nights, Threemile Harbor's December temperatures average at a cold 38.1°F (3.4°C).Humidity
In December, the average relative humidity in Threemile Harbor is 74%.Rainfall
The month with the most rainfall in Threemile Harbor is December, when the rain falls for 11.6 days and typically aggregates up to 3.54" (90mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Threemile Harbor, in December, during 1.8 snowfall days, 0.79" (20mm) of snow is typically accumulated. In Threemile Harbor, during the entire year, snow falls for 12.6 days and aggregates up to 5.94" (151mm) of snow.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 Threemile Harbor, New York, sunrise is at 6:54 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:30 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index in Threemile Harbor are January through March and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In December, a regular UV index of 2 translates into these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Threemile Harbor, NY
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 38.1°F
The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).
Average pressure in December
Threemile 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 (29.93"Hg).
Average wind speed in December
Threemile Harbor, NY
- Average wind speed in December: 16mph
The windiest month (with the highest average wind speed) is January (16.4mph).
The calmest month (with the lowest average wind speed) is July (10.8mph).
Average humidity in December
Threemile Harbor, NY
- Average humidity in December: 74%
The months with the highest relative humidity are May and June (82%).
The month with the lowest relative humidity is November (72%).
Average rainfall in December
Threemile Harbor, NY
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in December
Threemile Harbor, NY
- Average rainfall days in December: 11.6 days
The months with the highest number of rainy days are July and August (15.5 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Threemile Harbor, NY
- Average snowfall in December: 0.79"
The month with the highest snowfall is March (1.97").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Threemile Harbor, NY
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Threemile Harbor, NY
- Average daylight in December: 9h and 18min
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 36min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in December
Threemile Harbor, NY
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is November (18.4 days).
The months with the least sunshine days are July and August (13.3 days).
Average UV index in December
Threemile Harbor, 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 and December (UV index 2).
Average cloud cover in December
Threemile Harbor, NY
- Average cloud cover in December: 51
The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Threemile Harbor, 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).
