December weather forecastPort Byron, NY
December
Weather in December
The first month of the winter, December, is also an icy month in Port Byron, New York, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 25.7°F (-3.5°C).Temperature
December involves a decrease in temperature, down from a frosty 45.3°F (7.4°C) in November to an icy 34.7°F (1.5°C). Port Byron's nighttime temperature in December experiences a slight dip from daytime highs, falling to an average of 25.7°F (-3.5°C).Humidity
The average relative humidity in December is 85%.Rainfall
In Port Byron, in December, during 9.9 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. Throughout the year, in Port Byron, there are 164.7 rainfall days, and 29.17" (741mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Port Byron, during December, snow falls for 16 days and regularly aggregates up to 7.24" (184mm) of snow. Throughout the year, there are 80.8 snowfall days, and 35.91" (912mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.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, sunrise is at 7:37 am and sunset at 4:41 pm EST.
Sunshine
The average sunshine in December is 2.9h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 6min
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 54min
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).
