Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
An increase in the average high-temperature marks May, moving from April's cool 53.8°F (12.1°C) to a comfortable 63.7°F (17.6°C). During May, Old Westbury's temperature averages to a fresh 54.3°F (12.4°C) at night.Humidity
May and June, with an average relative humidity of 76%, are the most humid months.Rainfall
In Old Westbury, in May, it is raining for 10 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 103.6 rainfall days, and 7.83" (199mm) of precipitation is accumulated.Snowfall
In Old Westbury, snow does not fall in April through November.Daylight
In Old Westbury, the average length of the day in May is 14h and 28min.On the first day of the month, sunrise is at 5:51 am and sunset at 7:51 pm. On the last day of May, sunrise is at 5:25 am and sunset at 8:19 pm EDT.
Sunshine
In May, the average sunshine is 8.8h.UV index
In Old Westbury, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the most humid month?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
How many hours of daylight does Old Westbury have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Old Westbury have in May?
How high is the UV index in May?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Old Westbury, New York, USA
Weather forecast for your location
2. Allow the app to use your location