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
The transition into December indicates a reduction in the average high-temperature, down to a cold 36.5°F (2.5°C) from November's chilly 45.5°F (7.5°C). Portland, during December nights, observes a steady temperature, averaging at a freezing cold 29.3°F (-1.5°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Portland, during December, the rain falls for 11.5 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Portland, during the entire year, the rain falls for 176.8 days and collects up to 33.03" (839mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Portland, in December, during 12.5 snowfall days, 3.43" (87mm) of snow is typically accumulated. Throughout the year, there are 67.8 snowfall days, and 22.01" (559mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:28 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:55 pm EST.
Sunshine
In Portland, the average sunshine in December is 2.7h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Portland, New York. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. When the Sun is at its strongest around midday, find shade and limit exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How cold is December in Portland?
What is the average humidity in December in Portland?
How much does it rain in Portland in December?
How much does it snow in Portland in December?
What is the month with the shortest days in Portland?
What is the average length of the day in December in Portland?
When are sunrise and sunset in December in Portland?
How many hours of sunshine does Portland have in December?
What are the months with the lowest UV index in Portland?
How high is the UV index in December in Portland?
Average temperature in December
Portland, NY
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (74.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in December
Portland, 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
Portland, NY
- Average wind speed in December: 13.8mph
The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in December
Portland, NY
- Average humidity in December: 82%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is September (77%).
Average rainfall in December
Portland, NY
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Portland, NY
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is October (19.2 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in December
Portland, NY
- Average snowfall in December: 3.43"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Portland, NY
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is January (16 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Portland, 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 6min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Portland, NY
- Average sunshine days in December: 6.4 days
The month with the most sunshine days is September (11.3 days).
The month with the least sunshine days is January (5.4 days).
Average UV index in December
Portland, 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
Portland, NY
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Portland, NY
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Portland, New York, USA
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