May weather forecast
Old Westbury, NY

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Weather in May

May, the last month of the spring in Old Westbury, is an enjoyable month, with an average temperature fluctuating between 54.3°F (12.4°C) and 63.7°F (17.6°C).

Temperature

The arrival of May signals an increase in the average high-temperature, moving from a cool 53.8°F (12.1°C) in April to a refreshing 63.7°F (17.6°C). Throughout May, the temperature in Old Westbury tends to fall to a consistent average low of 54.3°F (12.4°C).

Humidity

May and June, with an average relative humidity of 76%, are the most humid months.

Rainfall

In May, the rain falls for 10 days. Throughout May, 0.75" (19mm) of precipitation is accumulated. In Old Westbury, New York, during the entire year, the rain falls for 103.6 days and collects up to 7.83" (199mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

In May, the average length of the day in Old Westbury is 14h and 28min.
On the first day of May, sunrise is at 5:51 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 8:19 pm EDT.

Sunshine

In Old Westbury, the average sunshine in May is 8.8h.

UV index

The average daily maximum UV index in May in Old Westbury, New York, is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 in May converts into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

What are the temperatures in Old Westbury in May?

The high-temperature, in May, in Old Westbury, records 63.7°F (17.6°C), while the low-temperature is 54.3°F (12.4°C).

What are the most humid months in Old Westbury?

The months with the highest humidity in Old Westbury are May and June, with an average relative humidity of 76%.

What is the average humidity in May in Old Westbury?

In May, the average relative humidity in Old Westbury is 76%.

How much does it rain in Old Westbury in May?

In Old Westbury, in May, during 10 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

When it does not snow in Old Westbury?

April through November are months without snowfall.

What is the average length of the day in May in Old Westbury?

In May, the average day length in Old Westbury is 14h and 28min.

When are sunrise and sunset in May in Old Westbury?

In May, on the first day of the month, sunrise is at 5:51 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 8:19 pm EDT.

How many hours of sunshine does Old Westbury have in May?

In May, the average sunshine duration in Old Westbury, New York, is 8.8h.

What is the UV index reading in May in Old Westbury?

In May, the average daily maximum UV index in Old Westbury, New York, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
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
Old Westbury, NY

Average temperature in May - Old Westbury, NY
  • Average high temperature in May: 63.7°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in May: 54.3°F

The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in May
Old Westbury, NY

Average pressure in May - Old Westbury, NY
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is 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
Old Westbury, NY

Average wind speed in May - Old Westbury, NY
  • Average wind speed in May: 9.2mph

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

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Average humidity in May
Old Westbury, NY

Average humidity in May - Old Westbury, NY
  • Average humidity in May: 76%

The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in May
Old Westbury, NY

Average rainfall in May - Old Westbury, NY
  • Average rainfall in May: 0.75"

The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is September (0.35").

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Average rainfall days in May
Old Westbury, NY

Average rainfall days in May - Old Westbury, NY
  • Average rainfall days in May: 10 days

The month with the highest number of rainy days is July (11.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in May
Old Westbury, NY

Average snowfall in May - Old Westbury, NY
  • Average snowfall in May: 0"

The month with the highest snowfall is March (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Old Westbury, NY

Average snowfall days in May - Old Westbury, NY
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Old Westbury, NY

Average daylight in May / Average sunshine in May - Old Westbury, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in May
Old Westbury, NY

Average sunshine days in May - Old Westbury, NY
  • Average sunshine days in May: 18.2 days

The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is July (16.9 days).

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Average UV index in May
Old Westbury, NY

Average UV index in May - Old Westbury, 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
Old Westbury, NY

Average cloud cover in May - Old Westbury, NY
  • Average cloud cover in May: 42

The month with the most cloud cover is December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in May
Old Westbury, NY

Average visibility in May - Old Westbury, 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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Old Westbury, New York, USA

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