December weather forecastWest Valley, NY
December
Weather in December
December, the first month of the winter in West Valley, is also a wintry month, with an average temperature varying between 33.6°F (0.9°C) and 24.6°F (-4.1°C).Temperature
The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a frosty 43.3°F (6.3°C) in November to a wintry 33.6°F (0.9°C). West Valley's evenings during December maintain an average temperature of 24.6°F (-4.1°C), aligning closely with the daytime temperatures.Humidity
In West Valley, the average relative humidity in December is 88%.Rainfall
In West Valley, during December, the rain falls for 9.7 days and regularly aggregates up to 2.17" (55mm) of precipitation. Throughout the year, there are 168.3 rainfall days, and 27.44" (697mm) of precipitation is accumulated.Snowfall
Months with snowfall in West Valley are January through May, October through December. In December, it is snowing for 18.8 days. Throughout December, 7.95" (202mm) of snow is accumulated. Throughout the year, in West Valley, there are 92.6 snowfall days, and 38.7" (983mm) 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 December in West Valley, New York, sunrise is at 7:24 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:51 pm EST.
Sunshine
The average sunshine in December is 2.5h.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index in West Valley. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
West Valley, NY
- Average high temperature in December: 33.6°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
West Valley, 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
West Valley, NY
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
West Valley, NY
- Average humidity in December: 88%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (80%).
Average rainfall in December
West Valley, NY
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is April (2.95").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
West Valley, NY
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is October (18.2 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
West Valley, NY
- Average snowfall in December: 7.95"
The month with the highest snowfall is January (8.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
West Valley, NY
- Average snowfall days in December: 18.8 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Valley, NY
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 2h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
West Valley, NY
- Average sunshine days in December: 6.1 days
The month with the most sunshine days is September (12.7 days).
The month with the least sunshine days is February (5.6 days).
Average UV index in December
West Valley, NY
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
West Valley, NY
- Average cloud cover in December: 76
The month with the most cloud cover is January (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
West Valley, NY
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
