Detroit
Michigan, USA
Long-term weather forecast
Long-term weather forecast

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

Temperature

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.

Humidity

In January, the average relative humidity is 84%.

Rainfall

In January, in Detroit, the rain falls for 7.1 days. Throughout January, 1.34" (34mm) of precipitation is accumulated. Throughout the year, 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. January is the month with the most snowfall. Snow falls for 14.5 days and accumulates 4.29" (109mm) of snow.

Ocean temperature

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

Daylight

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

Sunshine

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

UV index

In Detroit, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 interpret into the following advice:
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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

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.

What is the temperature in January in Detroit?

The average high-temperature, in January, in Detroit, Michigan, is 29.3°F (-1.5°C), while the average low-temperature is 19.6°F (-6.9°C).

What is the average humidity in January in Detroit?

The average relative humidity in January in Detroit is 84%.

How much does it rain in Detroit in January?

In Detroit, Michigan, in January, it is raining for 7.1 days, with typically 1.34" (34mm) of accumulated precipitation.

How much does it snow in Detroit in January?

In Detroit, during January, snow falls for 14.5 days and regularly aggregates up to 4.29" (109mm) of snow.

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.

What is the ocean 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 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.

How many hours of daylight does Detroit have in January?

The average length of the day in January is 9.5h.

What is the month with the least sunshine in Detroit?

With an average of 3.2h of sunshine, January has the least sunshine of the year in Detroit.

How long on average sun shines in January in Detroit?

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

How high is the UV index in January in Detroit?

The average daily maximum UV index in January in Detroit is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the UV radiation.
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).

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%).

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 lowest rainfall) is February (1.22").

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 lowest number of rainy days is January (7.1 days).

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 lowest snowfall are June, July, August and September (0").

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 lowest number of snowfall days are 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: 3.2h

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

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).