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 sea temperature 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 arrival of December corresponds with a shift in temperature, down from a chilly 45.7°F (7.6°C) in November to a wintry 35.2°F (1.8°C). River Rouge's December nights demonstrate minimal variation from the daytime temperatures, with an average of 27.5°F (-2.5°C).Humidity
The average relative humidity in December is 81%.Rainfall
February and December are months with the least rain when the rain falls for 6.8 days and typically aggregates up to 0.55" (14mm) of rain.Snowfall
Months with snowfall are January through May, November and December. In River Rouge, in December, snow falls for 9 days, with typically accumulated 0.63" (16mm) of snow. Throughout the year, there are 42.9 snowfall days, and 6.02" (153mm) of snow is accumulated.Ocean temperature
In River Rouge, in December, the average water temperature is 38.1°F (3.4°C).Note: While swimming, this is deemed life-threatening and exceptionally hazardous. The icy water induces intense pain and causes swift hyperventilation. Employing a specialized swimsuit is required to offset thermal harm.
Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:42 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 5:10 pm EST.
Sunshine
In December, the average sunshine is 3.7h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 1 during December translates into these guidelines:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. 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 December?
What is the average humidity in December in River Rouge?
What is the driest month?
How many days does it rain in December in River Rouge?
How many days does it snow in December?
What is the water temperature in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does River Rouge have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
River Rouge, MI
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in December
River Rouge, 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
River Rouge, MI
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in December
River Rouge, MI
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in December
River Rouge, MI
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February and December (0.55").
Average rainfall days in December
River Rouge, MI
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in December
River Rouge, MI
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
River Rouge, MI
- Average snowfall days in December: 9 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
River Rouge, MI
- Average sea temperature in December: 38.2°F
The best month for swimming (with the highest average sea temperature) is August (75.4°F).
The coldest month (with the lowest average sea temperature) is February (32.7°F).
Average daylight in December /
Average sunshine in December
River Rouge, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
River Rouge, MI
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in December
River Rouge, 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
River Rouge, MI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
River Rouge, 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).
River Rouge, Michigan, USA
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