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 average high-temperature drops in December, from November's frosty 44.8°F (7.1°C) to a cold 34.5°F (1.4°C). Merrifield's nighttime average temperature in December drops marginally from the daytime highs, settling at a freezing cold 25.7°F (-3.5°C).Humidity
The average relative humidity in December is 85%.Rainfall
In December, the rain falls for 5.5 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. In Merrifield, during the entire year, the rain falls for 115.7 days and collects up to 11.06" (281mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Merrifield, in December, during 12.2 snowfall days, 1.85" (47mm) of snow is typically accumulated. Throughout the year, there are 61.9 snowfall days, and 12.95" (329mm) 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, sunrise is at 7:17 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:42 pm EST.
Sunshine
In December, the average sunshine is 3h.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 of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 1 in December translates into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December in Merrifield?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Merrifield have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Merrifield, NY
- Average high temperature in December: 34.5°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 (28.4°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in December
Merrifield, 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
Merrifield, NY
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Merrifield, NY
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in December
Merrifield, NY
- Average rainfall in December: 0.75"
The wettest months (with the highest rainfall) are May and June (1.22").
The driest months (with the least rainfall) are January and September (0.67").
Average rainfall days in December
Merrifield, NY
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (3.9 days).
Average snowfall in December
Merrifield, NY
- Average snowfall in December: 1.85"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Merrifield, NY
- Average snowfall days in December: 12.2 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Merrifield, 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: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Merrifield, NY
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is February (12.7 days).
Average UV index in December
Merrifield, 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
Merrifield, NY
- Average cloud cover in December: 70
The month with the most cloud cover is February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Merrifield, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March and July (5mi).
Merrifield, New York, USA
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