May weather forecast
Shelter Island Heights, NY

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Weather in May

The last month of the spring, May, is a refreshing month in Shelter Island Heights, New York, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 58.6°F (14.8°C).

Temperature

As May sets, the average high-temperature shows a slight increase, moving up from a cool 50°F (10°C) in April to a mild 58.6°F (14.8°C). Shelter Island Heights reports an average low-temperature of 52.7°F (11.5°C) during the subtly cooler May nights.

Humidity

The months with the highest humidity in Shelter Island Heights are May and June, with an average relative humidity of 81%.

Rainfall

In Shelter Island Heights, in May, it is raining for 15.3 days, with typically 2.91" (74mm) of accumulated precipitation. In Shelter Island Heights, during the entire year, the rain falls for 154.1 days and collects up to 34.92" (887mm) of precipitation.

Snowfall

In Shelter Island Heights, snow does not fall in April through October.

Ocean temperature

In Shelter Island Heights, New York, in May, the average water temperature is 51.8°F (11°C).
Note: Unprotected swimming in 51.8°F (11°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.

Daylight

The average length of the day in May in Shelter Island Heights is 14h and 30min.
On the first day of May in Shelter Island Heights, sunrise is at 5:46 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:15 pm EDT.

Sunshine

The average sunshine in May in Shelter Island Heights is 8.6h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index, 5 during May, leads to the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Frequently asked questions

What are May temperatures in Shelter Island Heights?

Shelter Island Heights in May has an average high-temperature of 58.6°F (14.8°C) and an average low-temperature of 52.7°F (11.5°C).

What is the most humid month in Shelter Island Heights?

The months with the highest humidity in Shelter Island Heights are May and June, with an average relative humidity of 81%.

What is the average humidity in May in Shelter Island Heights?

In May, the average relative humidity in Shelter Island Heights, New York, is 81%.

How many days does it rain in May in Shelter Island Heights?

In Shelter Island Heights, New York, during May, the rain falls for 15.3 days and regularly aggregates up to 2.91" (74mm) of precipitation.

When it does not snow in Shelter Island Heights?

In Shelter Island Heights, snow does not fall in April through October.

How cold is the water in May in Shelter Island Heights?

In Shelter Island Heights, New York, the average seawater temperature in May is 51.8°F (11°C). Swimming in 51.8°F (11°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 Shelter Island Heights?

The average day length in May in Shelter Island Heights is 14h and 30min.

What time are sunrise and sunset in May in Shelter Island Heights?

On the first day of May in Shelter Island Heights, New York, sunrise is at 5:46 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:15 pm EDT.

How many hours of sunshine does Shelter Island Heights have in May?

In Shelter Island Heights, New York, the average sunshine duration in May is 8.6h.

What is the UV index intensity in May in Shelter Island Heights?

The average daily maximum UV index in May in Shelter Island Heights, New York, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Shelter Island Heights, NY

Average temperature in May - Shelter Island Heights, NY
  • Average high temperature in May: 58.6°F

The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in May: 52.7°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

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Average pressure in May
Shelter Island Heights, NY

Average pressure in May - Shelter Island Heights, NY
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Shelter Island Heights, NY

Average wind speed in May - Shelter Island Heights, NY
  • Average wind speed in May: 12mph

The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.4mph).

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Average humidity in May
Shelter Island Heights, NY

Average humidity in May - Shelter Island Heights, NY
  • Average humidity in May: 81%

The months with the highest relative humidity are May and June (81%).
The month with the lowest relative humidity is November (72%).

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Average rainfall in May
Shelter Island Heights, NY

Average rainfall in May - Shelter Island Heights, NY
  • Average rainfall in May: 2.91"

The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is September (2.17").

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Average rainfall days in May
Shelter Island Heights, NY

Average rainfall days in May - Shelter Island Heights, NY
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in May
Shelter Island Heights, NY

Average snowfall in May - Shelter Island Heights, NY
  • Average snowfall in May: 0"

The month with the highest snowfall is March (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Shelter Island Heights, NY

Average snowfall days in May - Shelter Island Heights, NY
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in May
Shelter Island Heights, NY

Average sea temperature in May - Shelter Island Heights, NY
  • Average sea temperature in May: 51.9°F

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

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Average daylight in May /
Average sunshine in May
Shelter Island Heights, NY

Average daylight in May / Average sunshine in May - Shelter Island Heights, NY
  • Average daylight in May: 14h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in May: 8h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Average sunshine days in May
Shelter Island Heights, NY

Average sunshine days in May - Shelter Island Heights, NY
  • Average sunshine days in May: 14.8 days

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is February (12.8 days).

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Average UV index in May
Shelter Island Heights, NY

Average UV index in May - Shelter Island Heights, NY
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).

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Average cloud cover in May
Shelter Island Heights, NY

Average cloud cover in May - Shelter Island Heights, NY
  • Average cloud cover in May: 43

The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in May
Shelter Island Heights, NY

Average visibility in May - Shelter Island Heights, NY
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Shelter Island Heights, New York, USA

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