May weather forecast
Ann Arbor, MI

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The vast University of Michigan Law School Campus in Ann Arbor, Michigan
The vast University of Michigan Law School Campus in Ann Arbor, Michigan

Weather in May

By the time May arrives, Ann Arbor residents prepare for increasingly warm temperatures and clear skies, a sign of the imminent summer. The weather remains mild and pleasant, making it the perfect time for outdoor activities and events. As May progresses, so do the daylight hours, reaching one of the year's highest levels. The month also sees a significant drop in snowfall and a shift towards more rainfall. May experiences a remarkable transformation in the low temperature from 38.3°F (3.5°C) in April to 49.8°F (9.9°C), signaling the end of chilly nights and the onset of warm summer evenings.

Temperature

May brings a temperature increase in Ann Arbor, with average high-temperatures moving from April's cool 54.3°F (12.4°C) to a comfortable 67.6°F (19.8°C). During May, the temperature is averaged to a low of 49.8°F (9.9°C) at night.

Humidity

The average relative humidity in May is 78%.

Rainfall

The month with the most rainfall is May, when the rain falls for 18.2 days and typically aggregates up to 2.4" (61mm) of precipitation.

Snowfall

Months with snowfall in Ann Arbor are January through May, October through December. May is the last month it regularly snows in Ann Arbor. During 0.1 snowfall days, in May, Ann Arbor aggregates 0.08" (2mm) of snow. In Ann Arbor, Michigan, during the entire year, snow falls for 45 days and aggregates up to 9.69" (246mm) of snow.

Daylight

The average length of the day in May in Ann Arbor, Michigan, is 14h and 37min.
On the first day of the month, sunrise is at 6:29 am and sunset at 8:34 pm. On the last day of May, in Ann Arbor, Michigan, sunrise is at 6:00 am and sunset at 9:04 pm EDT.

Sunshine

In Ann Arbor, the average sunshine in May is 8.6h.

UV index

The average daily maximum UV index in May in Ann Arbor is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are May temperatures in Ann Arbor?

May temperatures in Ann Arbor, Michigan, vary between a high-temperature of 67.6°F (19.8°C) and a low-temperature of 49.8°F (9.9°C).

What is the average humidity in May in Ann Arbor?

In Ann Arbor, the average relative humidity in May is 78%.

What is the rainiest month in Ann Arbor?

The month with the most rainfall in Ann Arbor, Michigan, is May, when the rain falls for 18.2 days and typically aggregates up to 2.4" (61mm) of precipitation.

How much does it rain in Ann Arbor in May?

In Ann Arbor, Michigan, in May, during 18.2 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

What is the last month it snows in Ann Arbor?

May is the last month it regularly snows in Ann Arbor, Michigan. During 0.1 snowfall days, in May, Ann Arbor aggregates 0.08" (2mm) of snow.

What is the average length of the day in May in Ann Arbor?

In May, the average day length is 14h and 37min.

When are sunrise and sunset in May in Ann Arbor?

In May, on the first day of the month, sunrise is at 6:29 am and sunset at 8:34 pm. On the last day of the month, in Ann Arbor, sunrise is at 6:00 am and sunset at 9:04 pm EDT.

How long on average sun shines in May in Ann Arbor?

The average sunshine duration in May is 8.6h.

What is the UV index intensity in May in Ann Arbor?

In Ann Arbor, Michigan, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
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 May
Ann Arbor, MI

Average temperature in May - Ann Arbor, MI
  • Average high temperature in May: 67.6°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 (28.2°F).

  • Average low temperature in May: 49.8°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).

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Average pressure in May
Ann Arbor, MI

Average pressure in May - Ann Arbor, MI
  • Average pressure in May: 29.98"Hg

The months with the highest atmospheric pressure are March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Ann Arbor, MI

Average wind speed in May - Ann Arbor, MI
  • Average wind speed in May: 8.1mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

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Average humidity in May
Ann Arbor, MI

Average humidity in May - Ann Arbor, MI
  • Average humidity in May: 78%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in May
Ann Arbor, MI

Average rainfall in May - Ann Arbor, MI
  • Average rainfall in May: 2.4"

The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is December (0.87").

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Average rainfall days in May
Ann Arbor, MI

Average rainfall days in May - Ann Arbor, MI
  • Average rainfall days in May: 18.2 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (5.2 days).

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Average snowfall in May
Ann Arbor, MI

Average snowfall in May - Ann Arbor, MI
  • Average snowfall in May: 0.08"

The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Ann Arbor, MI

Average snowfall days in May - Ann Arbor, MI
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Ann Arbor, MI

Average daylight in May / Average sunshine in May - Ann Arbor, MI
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in May
Ann Arbor, MI

Average sunshine days in May - Ann Arbor, MI
  • Average sunshine days in May: 10.4 days

The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is July (10.3 days).

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Average UV index in May
Ann Arbor, MI

Average UV index in May - Ann Arbor, MI
  • Average UV index in May: 5

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 May
Ann Arbor, MI

Average cloud cover in May - Ann Arbor, MI
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in May
Ann Arbor, MI

Average visibility in May - Ann Arbor, MI
  • Average visibility in May: 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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Ann Arbor, Michigan, USA

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