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's arrival corresponds with a decrease in average high-temperatures, from November's chilly 45.9°F (7.7°C) to a wintry 34.7°F (1.5°C). Ypsilanti maintains an average of approximately a subzero cold 26.1°F (-3.3°C) during December nights, with only a minimal decrease from the daytime temperature.Humidity
In December, the average relative humidity in Ypsilanti is 83%.Rainfall
The months with the least rainfall are February and December Rain falls for 7.6 days and accumulates 0.87" (22mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Ypsilanti, during December, snow falls for 8.6 days and regularly aggregates up to 1.14" (29mm) of snow. In Ypsilanti, during the entire year, snow falls for 44.9 days and aggregates up to 9.17" (233mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Ypsilanti.On the first day of the month, sunrise is at 7:44 am and sunset at 5:03 pm. On the last day of December, in Ypsilanti, sunrise is at 8:03 am and sunset at 5:12 pm EST.
Sunshine
In December, the average sunshine is 3.5h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 1 in December translates into this advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Ypsilanti in December?
What is the average humidity in December in Ypsilanti?
What is the driest month in Ypsilanti?
How many days does it rain in December in Ypsilanti?
How much does it snow in Ypsilanti in December?
What is the month with the shortest days in Ypsilanti?
How many hours of daylight does Ypsilanti have in December?
When are sunrise and sunset in December in Ypsilanti?
How long on average sun shines in December in Ypsilanti?
What is the month with the lowest UV index in Ypsilanti?
How high is the UV index in December in Ypsilanti?
Average temperature in December
Ypsilanti, MI
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Ypsilanti, MI
- Average pressure in December: 30.08"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
Ypsilanti, MI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in December
Ypsilanti, MI
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Ypsilanti, MI
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.32").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days in December
Ypsilanti, MI
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Ypsilanti, MI
- Average snowfall in December: 1.14"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Ypsilanti, MI
- Average snowfall days in December: 8.6 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ypsilanti, MI
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Ypsilanti, MI
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is October (17.3 days).
The months with the least sunshine days are May and July (10.8 days).
Average UV index in December
Ypsilanti, MI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Ypsilanti, MI
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Ypsilanti, MI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Ypsilanti, Michigan, USA
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