December weather forecastCopper Harbor, MI
December
Weather in December
December in Copper Harbor welcomes the depth of winter, featuring the coldest conditions with daily high temperatures averaging at a chilly 29.5°F (-1.4°C). The UV index staying at 1 suggests that the town is shrouded in winter's grip, while the increased snowfall from November corroborates it. As the year concludes, Copper Harbor is entrenched in winter's grip, laying the groundwork for January's snow-laden climate.Temperature
The start of December in Copper Harbor signals a decrease in the average high-temperature, transitioning from a wintry 38.5°F (3.6°C) in November to a subzero cold 29.5°F (-1.4°C). Throughout the nights in December, Copper Harbor notes an average low of 24.1°F (-4.4°C), a small dip from the daytime peak.Humidity
In December, the average relative humidity is 83%.Rainfall
In Copper Harbor, Michigan, in December, during 5.5 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, there are 116.2 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
Months with snowfall in Copper Harbor are January through May, October through December. The month with the most snowfall in Copper Harbor is December, when snow falls for 15.2 days and typically aggregates up to 3.86" (98mm) of snow.Daylight
The month with the shortest days in Copper Harbor is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 8:19 am and sunset at 5:02 pm. On the last day of December, in Copper Harbor, sunrise is at 8:39 am and sunset at 5:10 pm EST.
Sunshine
In Copper Harbor, Michigan, the average sunshine in December is 1.4h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Copper Harbor, MI
- Average high temperature in December: 29.5°F
The warmest month (with the highest average high temperature) is August (62.6°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is August (57.6°F).
The coldest month (with the lowest average low temperature) is February (17.2°F).
Average pressure in December
Copper Harbor, MI
- Average pressure in December: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The months with the lowest atmospheric pressure are June and July (29.92"Hg).
Average wind speed in December
Copper Harbor, MI
- Average wind speed in December: 17.6mph
The windiest month (with the highest average wind speed) is January (17.8mph).
The calmest month (with the lowest average wind speed) is July (10mph).
Average humidity in December
Copper Harbor, MI
- Average humidity in December: 83%
The months with the highest relative humidity are January and July (85%).
The months with the lowest relative humidity are October and November (78%).
Average rainfall in December
Copper Harbor, MI
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is March (1.46").
Average rainfall days in December
Copper Harbor, MI
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is October (15.7 days).
The month with the least rainy days is February (1.4 days).
Average snowfall in December
Copper Harbor, MI
- Average snowfall in December: 3.86"
The month with the highest snowfall is December (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Copper Harbor, MI
- Average snowfall days in December: 15.2 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Copper Harbor, MI
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 1h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 1h and 12min).
Average sunshine days in December
Copper Harbor, MI
- Average sunshine days in December: 4.1 days
The months with the most sunshine days are July and August (16.7 days).
The month with the least sunshine days is January (3.8 days).
Average UV index in December
Copper Harbor, MI
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Copper Harbor, MI
- Average cloud cover in December: 86
The month with the most cloud cover is January (Cloud cover 89).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Copper Harbor, MI
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and December (4mi).
