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 onset of December entails a temperature shift, as the average high-temperature decreases from a cold 36°F (2.2°C) in November to a freezing cold 24.1°F (-4.4°C). The nights of December cool down to an average low of 15.1°F (-9.4°C), subtly lower than daytime highs.Humidity
The average relative humidity in December is 90%.Rainfall
In December, the rain falls for 5.3 days. Throughout December, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 128.5 rainfall days, and 24.76" (629mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 23.8 days and accumulates 11.18" (284mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 8:20 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 8:40 am and sunset at 5:20 pm EST.
Sunshine
In Sleepy Hollow, Michigan, the average sunshine in December is 2.2h.UV index
The months with the lowest UV index are January, March, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 1 in December translates into this advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. 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
How cold is December in Sleepy Hollow?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month in Sleepy Hollow?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Sleepy Hollow have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Sleepy Hollow, MI
- Average high temperature in December: 24.1°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (18.5°F).
- Average low temperature in December: 15.1°F
The month with the highest average low temperature is July (56.3°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in December
Sleepy Hollow, MI
- Average pressure in December: 30.06"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Sleepy Hollow, MI
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is November (8.7mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in December
Sleepy Hollow, MI
- Average humidity in December: 90%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (71%).
Average rainfall in December
Sleepy Hollow, MI
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in December
Sleepy Hollow, MI
- Average rainfall days in December: 5.3 days
The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in December
Sleepy Hollow, MI
- Average snowfall in December: 11.18"
The month with the highest snowfall is December (11.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sleepy Hollow, MI
- Average snowfall days in December: 23.8 days
The month with the highest number of snowfall days is January (26.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Sleepy Hollow, MI
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 2h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in December
Sleepy Hollow, MI
- Average sunshine days in December: 6.5 days
The month with the most sunshine days is September (13.4 days).
The month with the least sunshine days is January (5 days).
Average UV index in December
Sleepy Hollow, MI
- 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 January, March, November and December (UV index 1).
Average cloud cover in December
Sleepy Hollow, MI
- Average cloud cover in December: 79
The month with the most cloud cover is January (Cloud cover 83).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in December
Sleepy Hollow, MI
- Average visibility in December: 4mi
The months with the highest visibility are May, June and July (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Sleepy Hollow, Michigan, USA
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