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

May 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
May, the last month of the spring, in Detroit, is a comfortable month, with average temperature varying between 50.2°F (10.1°C) and 65.3°F (18.5°C).

Temperature

In Detroit, the average high-temperature in May increases, from a fresh 53.1°F (11.7°C) in April, to an enjoyable 65.3°F (18.5°C). In May, in Detroit, the average low-temperature is 50.2°F (10.1°C).

Humidity

The average relative humidity in May is 75%.

Rainfall

May is the month with the most rainfall. Rain falls for 16.8 days and accumulates 2.87" (73mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Detroit. During 0.3 snowfall days, in May, Detroit aggregates 0.43" (11mm) 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, Michigan, the average water temperature is 48.9°F (9.4°C).
Note: Swimming in 48.9°F (9.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In May, the average length of the day is 14.6h.

Sunshine

The average sunshine in Detroit is 8.9h.

UV index

In Detroit, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Detroit?

In May, in Detroit, Michigan, the average high-temperature is 65.3°F (18.5°C), and the average low-temperature is 50.2°F (10.1°C).

What is the average humidity in May in Detroit?

The average relative humidity in May is 75%.

How much does it rain in Detroit in May?

In Detroit, during May, the rain falls for 16.8 days and regularly aggregates up to 2.87" (73mm) of precipitation.

What is the rainiest month in Detroit?

May is the month with the most rainfall in Detroit, Michigan. Rain falls for 16.8 days and accumulates 2.87" (73mm) of precipitation.

What is the last month it snows in Detroit?

May is the last month it regularly snows in Detroit, Michigan. During 0.3 snowfall days, in May, Detroit aggregates 0.43" (11mm) of snow.

What is the water temperature in May in Detroit?

In Detroit, Michigan, the average seawater temperature in May is 48.9°F (9.4°C). Swimming in 48.9°F (9.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

The average length of the day in May in Detroit is 14.6h.

How many hours of sunshine does Detroit have in May?

The average sunshine in May in Detroit, Michigan, is 8.9h.

What is the UV index reading in May in Detroit?

In May, the average daily maximum UV index in Detroit, Michigan, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.
Average temperature in May - Detroit, MI
  • Average high temperature in May: 65.3°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 May: 50.2°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 May - Detroit, MI
  • Average humidity in May: 75%

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

Average rainfall in May - Detroit, MI
  • Average rainfall in May: 2.87"

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 May - Detroit, MI
  • Average rainfall days in May: 16.8 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 May - Detroit, MI
  • Average snowfall in May: 0.43"

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 May - Detroit, MI
  • Average snowfall days in May: 0.3 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 May - Detroit, MI
  • Average sea temperature in May: 48.9°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 May / Average sunshine in May - Detroit, MI
  • Average daylight in May: 14.6h

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 May: 8.9h

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 May - Detroit, MI
  • Average UV index in May: 5

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).