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
December brings a drop in West Tappan's average high-temperature, falling from a frosty 45.3°F (7.4°C) in November to a cold 34.7°F (1.5°C). In West Tappan, the nocturnal temperatures throughout December show a marginal dip from the daytime averages, settling at a freezing cold 26.2°F (-3.2°C).Humidity
In West Tappan, the average relative humidity in December is 82%.Rainfall
In December, the rain falls for 8 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. In West Tappan, during the entire year, the rain falls for 138 days and collects up to 17.8" (452mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 11.3 days. Throughout December, 1.54" (39mm) of snow is accumulated. In West Tappan, during the entire year, snow falls for 55.4 days and aggregates up to 10.55" (268mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:42 am and sunset at 4:56 pm. On the last day of December, in West Tappan, sunrise is at 8:01 am and sunset at 5:05 pm EST.
Sunshine
The average sunshine in December is 3.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 1 in December suggests the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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 much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does West Tappan have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does West Tappan have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
West Tappan, MI
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
West Tappan, MI
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
West Tappan, MI
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in December
West Tappan, MI
- Average humidity in December: 82%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in December
West Tappan, MI
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in December
West Tappan, MI
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
West Tappan, MI
- Average snowfall in December: 1.54"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
West Tappan, MI
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (13 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 Tappan, MI
- 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
West Tappan, MI
- Average sunshine days in December: 13.8 days
The months with the most sunshine days are October and November (15 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in December
West Tappan, MI
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
West Tappan, MI
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
West Tappan, MI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
West Tappan, Michigan, USA
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