December weather forecastPenfield, NY
December
Weather in December
December, the first month of the winter in Penfield, is also a wintry month, with an average temperature varying between 36°F (2.2°C) and 27.1°F (-2.7°C).Temperature
The onset of December introduces a moderate change in Penfield's weather, with average high-temperatures falling from November's chilly 46.2°F (7.9°C) to a cold 36°F (2.2°C). Penfield records a consistent average nighttime temperature of 27.1°F (-2.7°C) in December, slightly lower than the daytime high.Humidity
The average relative humidity in December is 83%.Rainfall
In Penfield, New York, in December, during 10.2 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. In Penfield, during the entire year, the rain falls for 163.3 days and collects up to 23.7" (602mm) of precipitation.Snowfall
Months with snowfall in Penfield, New York, are January through May, October through December. In December, it is snowing for 15 days. Throughout December, 4.13" (105mm) of snow is accumulated. Throughout the year, there are 70.8 snowfall days, and 20.16" (512mm) of snow is accumulated.Daylight
The month with the shortest days in Penfield is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:44 pm EST.
Sunshine
The average sunshine in December in Penfield is 3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Penfield, New York. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 1 in December translates into this advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Penfield, NY
- Average high temperature in December: 36°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 (29.7°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in December
Penfield, 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
Penfield, NY
- Average wind speed in December: 10.6mph
The windiest months (with the highest average wind speed) are January and February (11.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
Penfield, NY
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is September (76%).
Average rainfall in December
Penfield, NY
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in December
Penfield, NY
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in December
Penfield, NY
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Penfield, NY
- Average snowfall days in December: 15 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Penfield, 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: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Penfield, NY
- Average sunshine days in December: 8.1 days
The months with the most sunshine days are May and September (12.8 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in December
Penfield, 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
Penfield, NY
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Penfield, NY
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
