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 the transition to December, Portageville observes a drop in the average high-temperature, moving from a frosty 44.2°F (6.8°C) in November to a wintry 34.3°F (1.3°C). December witnesses an average nighttime temperature of 24.6°F (-4.1°C).Humidity
In Portageville, the average relative humidity in December is 86%.Rainfall
In Portageville, in December, it is raining for 10.1 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 165.3 rainfall days, and 24.09" (612mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 16.1 days. Throughout December, 5.94" (151mm) of snow is accumulated. In Portageville, New York, during the entire year, snow falls for 83.5 days and aggregates up to 30.98" (787mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:22 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:49 pm EST.
Sunshine
The average sunshine in December is 3h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Boost your sun resistance with garments that are densely woven yet spacious. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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?
How many hours of daylight does Portageville have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Portageville, NY
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in December
Portageville, 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
Portageville, NY
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Portageville, NY
- Average humidity in December: 86%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (77%).
Average rainfall in December
Portageville, NY
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is October (2.64").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Portageville, NY
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (7 days).
Average snowfall in December
Portageville, NY
- Average snowfall in December: 5.94"
The month with the highest snowfall is February (7.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Portageville, NY
- Average snowfall days in December: 16.1 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
Portageville, NY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
Portageville, NY
- Average sunshine days in December: 8.6 days
The month with the most sunshine days is September (14.1 days).
The month with the least sunshine days is February (6.4 days).
Average UV index in December
Portageville, 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
Portageville, NY
- Average cloud cover in December: 71
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Portageville, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May and June (6mi).
The month with the lowest visibility is January (4mi).
Portageville, New York, USA
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