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
January is the peak of winter in Detroit and has a moderately high humidity of 75%. The weather is characterized by extremely low temperatures in the range of 17.6°F (-8°C) and 33.8°F (1°C). Occasionally during nights, the temperature drops below 14°F (-10°C) due to cold winter winds that dominate throughout the season.
Snow falls for an average of eleven days and collects the year's highest accumulation of 12.6" (320mm). With approximately eleven rainy days and low precipitation of 2" (50.8mm), January remains the driest month of the year. The sun shines for an average of three hours per day, making most days gloomy and mildly wet. The sea temperature in January is 37.4°F (3°C) on average, and activities around the lakes are virtually non-existent.

What is the coldest month in Detroit?

With an average high-temperature of 32°F (0°C) and an average low-temperature of 19°F (-7.2°C), January is the coldest month in Detroit, Michigan.

What is the temperature in January in Detroit?

In January, the average high-temperature is 32°F (0°C), and the average low-temperature is 19°F (-7.2°C).

What is the average humidity in January in Detroit?

In January, the average relative humidity in Detroit is 74.7%.

How many days does it rain in January in Detroit?

In Detroit, in January, it is raining for 13.1 days, with typically 2" (49.8mm) of accumulated precipitation.

What is the driest month in Detroit?

The month with the least rainfall is January when the rain falls for 13.1 days and typically collects 2" (49.8mm) of precipitation.

How many days does it snow in January in Detroit?

In Detroit, Michigan, in January, snow falls for 10.4 days, with typically accumulated 12.5" (317.5mm) of snow.

When does it snow the most in Detroit?

The month with the most snowfall in Detroit is January when snow falls for 10.4 days and typically aggregates up to 12.5" (317.5mm) of snow.

What is the water temperature 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 life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

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.

How many hours of sunshine does Detroit have in January?

In Detroit, Michigan, the average sunshine in January is 3.9h.

When is the lowest UV index in Detroit?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Detroit.

How high is the UV index in January in Detroit?

In January, the average daily maximum UV index in Detroit is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in January - Detroit, MI
  • Average high temperature in January: 32°F

The warmest month (with the highest average high temperature) is July (83.4°F).
The month with the lowest average high temperature is January (32°F).

  • Average low temperature in January: 19.1°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (19.1°F).

Average humidity in January - Detroit, MI
  • Average humidity in January: 74.7%

The month with the highest relative humidity is December (76.7%).
The month with the lowest relative humidity is May (65.3%).

Average rainfall in January - Detroit, MI
  • Average rainfall in January: 2"

The wettest month (with the highest rainfall) is June (3.5").
Driest months (with the lowest rainfall) are January and February (2").

Average rainfall days in January - Detroit, MI
  • Average rainfall days in January: 13.1 days

The month with the highest number of rainy days is December (13.7 days).
The month with the lowest number of rainy days is September (9.5 days).

Average snowfall in January - Detroit, MI
  • Average snowfall in January: 12.5"

The month with the highest snowfall is January (12.5").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in January - Detroit, MI
  • Average snowfall days in January: 10.4 days

The month with the highest number of snowfall days is January (10.4 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

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).

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 shortest days is December (Average daylight: 9.1h).

  • Average sunshine in January: 3.9h

The month with most sunshine is July (Average sunshine: 10.2h).
The month with least sunshine is December (Average sunshine: 2.8h).

Average UV index in January - Detroit, MI
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).

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