December weather forecast
Detroit, MI

The downtown city of Detroit, Michigan viewed from a bird
The downtown city of Detroit, Michigan viewed from a bird's eye angle

Weather in December

The first month of the winter, December, is still a cold month in Detroit, Michigan, with temperature in the range of an average high of 35.2°F (1.8°C) and an average low of 27.5°F (-2.5°C).

Temperature

In December, the average high-temperature decreases from a chilly 45.7°F (7.6°C) in November to a cold 35.2°F (1.8°C). In December, the average low-temperature is 27.5°F (-2.5°C).

Humidity

In Detroit, the average relative humidity in December is 81%.

Rainfall

In Detroit, Michigan, during 8.5 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Detroit, during the entire year, the rain falls for 152.1 days and collects up to 23.43" (595mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Detroit, snow falls for 12.4 days, with typically accumulated 2.28" (58mm) of snow. In Detroit, during the entire year, snow falls for 54.3 days and aggregates up to 14.84" (377mm) of snow.

Ocean temperature

In Detroit, the average seawater temperature in December is 38.1°F (3.4°C).
Note: For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

Daylight

The month with the shortest days in Detroit is December, with an average of 9h and 8min of daylight.
On the first day of December in Detroit, sunrise is at 7:41 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 5:09 pm EST.

Sunshine

The average sunshine in December is 3.6h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index in Detroit. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 1 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Detroit?

In December, the average relative humidity is 81%.

How much does it rain in Detroit in December?

In Detroit, Michigan, in December, it is raining for 8.5 days, with typically 1.26" (32mm) of accumulated precipitation.

How many days does it snow in December in Detroit?

In December, in Detroit, it is snowing for 12.4 days. Throughout December, 2.28" (58mm) of snow is accumulated.

What is the ocean temperature in December in Detroit?

In Detroit, Michigan, in December, the average water temperature is 38.1°F (3.4°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the month with the shortest days in Detroit?

With an average of 9h and 8min of daylight, December has the shortest days of the year.

How many hours of daylight does Detroit have in December?

In December, the average day length in Detroit, Michigan, is 9h and 8min.

When are sunrise and sunset in December in Detroit?

In December, on the first day of the month, sunrise is at 7:41 am and sunset at 5:00 pm. On the last day of the month, in Detroit, Michigan, sunrise is at 8:01 am and sunset at 5:09 pm EST.

How long on average sun shines in December in Detroit?

The average sunshine duration in December is 3.6h.

When is the lowest UV index in Detroit?

December is the month with the lowest UV index in Detroit, Michigan, with an average maximum UV index of 1.

What is the UV index intensity in December in Detroit?

In December, the average daily maximum UV index in Detroit is 1. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Detroit, MI

Average temperature in December - Detroit, MI
  • Average high temperature in December: 35.2°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 (29.3°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).

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Average pressure in December
Detroit, MI

Average pressure in December - Detroit, 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).

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Average wind speed in December
Detroit, MI

Average wind speed in December - Detroit, MI
  • Average wind speed in December: 10.3mph

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

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Average humidity in December
Detroit, MI

Average humidity in December - Detroit, MI
  • Average humidity in December: 81%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (73%).

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Average rainfall in December
Detroit, MI

Average rainfall in December - Detroit, MI
  • Average rainfall in December: 1.26"

The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in December
Detroit, MI

Average rainfall days in December - Detroit, MI
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.1 days).

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Average snowfall in December
Detroit, MI

Average snowfall in December - Detroit, MI
  • Average snowfall in December: 2.28"

The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Detroit, MI

Average snowfall days in December - Detroit, MI
  • Average snowfall days in December: 12.4 days

The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in December
Detroit, MI

Average sea temperature in December - Detroit, 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).

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Average daylight in December /
Average sunshine in December
Detroit, MI

Average daylight in December / Average sunshine in December - Detroit, MI
  • Average daylight in December: 9h and 8min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in December: 3h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

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Average sunshine days in December
Detroit, MI

Average sunshine days in December - Detroit, MI
  • Average sunshine days in December: 13 days

The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is February (10.7 days).

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Average UV index in December
Detroit, MI

Average UV index in December - Detroit, 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).

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Average cloud cover in December
Detroit, MI

Average cloud cover in December - Detroit, 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).

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Average visibility in December
Detroit, MI

Average visibility in December - Detroit, 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).

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