January weather forecast and climate
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 January

January, the same as December, in Detroit, Michigan, is a freezing cold winter month, with average temperature varying between 29.3°F (-1.5°C) and 19.6°F (-6.9°C).

Temperature

The coldest month is January, with an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 19.6°F (-6.9°C).

Humidity

In Detroit, the average relative humidity is 84%.

Rainfall

In Detroit, it is raining for 7.1 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, in Detroit, there are 152.1 rainfall days, and 23.43" (595mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. The month with the most snowfall in Detroit is January when snow falls for 14.5 days and typically aggregates up to 4.29" (109mm) of snow.

Ocean temperature

In Detroit, the average seawater temperature is 33.6°F (0.9°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

In January, the average length of the day is 9.5h.

Sunshine

The month with the least sunshine is January, with an average of 3.2h of sunshine.

UV index

In January, the average daily maximum UV index in Detroit is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from 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 coldest month in Detroit?

With an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 19.6°F (-6.9°C), January is the coldest month in Detroit.

What is the average humidity in January in Detroit?

In January, the average relative humidity in Detroit is 84%.

How much does it rain in Detroit in January?

In Detroit, in January, during 7.1 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

What is the snowiest month in Detroit?

January is the month with the most snowfall in Detroit, Michigan. Snow falls for 14.5 days and accumulates 4.29" (109mm) of snow.

How many days does it snow in January in Detroit?

In January, it is snowing for 14.5 days. Throughout January, 4.29" (109mm) of snow is accumulated.

How cold is the water in January in Detroit?

In Detroit, Michigan, in January, the average water temperature is 33.6°F (0.9°C). 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.

What is the average length of the day in January in Detroit?

In January, the average length of the day in Detroit is 9.5h.

What is the month with the least sunshine in Detroit?

January has the least sunshine of the year, with an average of 3.2h of sunshine.

How many hours of sunshine does Detroit have in January?

In Detroit, Michigan, the average sunshine in January is 3.2h.

What is the UV index intensity in January in Detroit?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.

Average temperature in January
Detroit, MI

Average temperature in January - Detroit, MI
  • Average high temperature in January: 29.3°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 January: 19.6°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 January
Detroit, MI

Average pressure in January - Detroit, MI
  • Average pressure in January: 30.08"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in January
Detroit, MI

Average wind speed in January - Detroit, MI
  • Average wind speed in January: 10.5mph

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 January
Detroit, MI

Average humidity in January - Detroit, MI
  • Average humidity in January: 84%

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

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Average rainfall in January
Detroit, MI

Average rainfall in January - Detroit, MI
  • Average rainfall in January: 1.34"

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 January
Detroit, MI

Average rainfall days in January - Detroit, MI
  • Average rainfall days in January: 7.1 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 January
Detroit, MI

Average snowfall in January - Detroit, MI
  • Average snowfall in January: 4.29"

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

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Average snowfall days in January
Detroit, MI

Average snowfall days in January - Detroit, MI
  • Average snowfall days in January: 14.5 days

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

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Average sea temperature in January
Detroit, MI

Average sea temperature in January - Detroit, MI
  • Average sea temperature in January: 33.6°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 January /
Average sunshine in January
Detroit, MI

Average daylight in January / Average sunshine in January - Detroit, MI
  • Average daylight in January: 9.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in January: 3.2h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 3.2h).

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Average sunshine days in January
Detroit, MI

Average sunshine days in January - Detroit, MI
  • Average sunshine days in January: 11.2 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 January
Detroit, MI

Average UV index in January - Detroit, MI
  • Average UV index in January: 2

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 January
Detroit, MI

Average cloud cover in January - Detroit, MI
  • Average cloud cover in January: 67

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 January
Detroit, MI

Average visibility in January - Detroit, MI
  • Average visibility in January: 5mi

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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