December weather forecastLancaster, NY
December
Weather in December
The first month of the winter, December, is also an icy month in Lancaster, New York, with an average temperature varying between 27°F (-2.8°C) and 35.4°F (1.9°C).Temperature
Stepping into December, Lancaster observes a temperature decline, with the average high falling from November's frosty 45.5°F (7.5°C) to a cold 35.4°F (1.9°C). Lancaster's December nights witness minimal differential from the daytime temperatures, with averages of 27°F (-2.8°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In Lancaster, during December, the rain falls for 8.5 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 139.2 rainfall days, and 14.84" (377mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Lancaster, New York, in December, snow falls for 13.2 days, with typically accumulated 2.28" (58mm) of snow. Throughout the year, in Lancaster, there are 62.1 snowfall days, and 12.68" (322mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in Lancaster, sunrise is at 7:26 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:50 pm EST.
Sunshine
The average sunshine in December in Lancaster is 2.7h.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 hazard from unprotected exposure to Sun's UV rays for average individuals.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lancaster, NY
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Lancaster, 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 (29.93"Hg).
Average wind speed in December
Lancaster, NY
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
Lancaster, NY
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are July and August (75%).
Average rainfall in December
Lancaster, NY
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in December
Lancaster, NY
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in December
Lancaster, NY
- Average snowfall in December: 2.28"
The months with the highest snowfall are January and February (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lancaster, NY
- Average snowfall days in December: 13.2 days
The month with the highest number of snowfall days is January (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lancaster, 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 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Lancaster, NY
- Average sunshine days in December: 12.3 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (10.2 days).
Average UV index in December
Lancaster, 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, February and December (UV index 1).
Average cloud cover in December
Lancaster, NY
- Average cloud cover in December: 72
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Lancaster, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
