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 is accompanied by a temperature decrease, with the average high-temperature shifting from a chilly 45.3°F (7.4°C) in November to a cold 34.7°F (1.5°C). Port Byron, in December, logs an average low-temperature of 25.7°F (-3.5°C), a subtle step down from daytime readings.Humidity
In Port Byron, the average relative humidity in December is 85%.Rainfall
In Port Byron, New York, in December, during 9.9 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Port Byron, during the entire year, the rain falls for 164.7 days and collects up to 29.17" (741mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 16 days. Throughout December, 7.24" (184mm) of snow is accumulated. Throughout the year, there are 80.8 snowfall days, and 35.91" (912mm) 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 the month, sunrise is at 7:18 am and sunset at 4:32 pm. On the last day of December, in Port Byron, New York, sunrise is at 7:37 am and sunset at 4:41 pm EST.
Sunshine
In Port Byron, the average sunshine in December is 2.9h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Port Byron. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 1 in December translates into these instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
How cold is it in Port Byron in December?
What is the average humidity in December in Port Byron?
How many days does it rain in December in Port Byron?
How much does it snow in Port Byron in December?
What is the month with the shortest days in Port Byron?
How many hours of daylight does Port Byron have in December?
When are sunrise and sunset in December in Port Byron?
How many hours of sunshine does Port Byron have in December?
What is the month with the lowest UV index in Port Byron?
What is the UV index reading in December in Port Byron?
Average temperature in December
Port Byron, NY
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Port Byron, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Port Byron, NY
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Port Byron, NY
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is April (78%).
Average rainfall in December
Port Byron, NY
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is October (3.27").
The driest months (with the least rainfall) are January and September (1.93").
Average rainfall days in December
Port Byron, NY
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is April (17.3 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Port Byron, NY
- Average snowfall in December: 7.24"
The month with the highest snowfall is February (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Port Byron, NY
- Average snowfall days in December: 16 days
The month with the highest number of snowfall days is January (19.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Port Byron, 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: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Port Byron, NY
- Average sunshine days in December: 8 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in December
Port Byron, 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, February and December (UV index 1).
Average cloud cover in December
Port Byron, NY
- Average cloud cover in December: 71
The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Port Byron, 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).
Port Byron, New York, USA
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