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
The shift from April to May sees an increase in the average high-temperature, transitioning from a cool 52.9°F (11.6°C) to a comfortable 62.2°F (16.8°C). May nights in West Islip reflect a consistent temperature dip to a cool 54.7°F (12.6°C), a slight descent from daytime peaks.Humidity
With an average relative humidity of 78%, May is the most humid month.Rainfall
In May, the rain falls for 16.2 days. Throughout May, 3.11" (79mm) of precipitation is accumulated. In West Islip, during the entire year, the rain falls for 157 days and collects up to 35.98" (914mm) of precipitation.Snowfall
In West Islip, New York, snow does not fall in May through September.Daylight
In May, the average length of the day in West Islip is 14h and 28min.On the first day of the month, sunrise is at 5:50 am and sunset at 7:49 pm. On the last day of May, sunrise is at 5:24 am and sunset at 8:17 pm EDT.
Sunshine
In May, the average sunshine in West Islip is 9h.UV index
In West Islip, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In May, an average UV index of 5 transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. To guard against the harmful effects of the Sun, minimize exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in West Islip?
What is the most humid month in West Islip?
What is the average humidity in May in West Islip?
How much does it rain in West Islip in May?
When it does not snow in West Islip?
Does it snow in West Islip in May?
How many hours of daylight does West Islip have in May?
What time are sunrise and sunset in May in West Islip?
How many hours of sunshine does West Islip have in May?
What is the UV index reading in May in West Islip?
Average temperature in May
West Islip, NY
- Average high temperature in May: 62.2°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in May: 54.7°F
The months with the highest average low temperature are July and August (72°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in May
West Islip, 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
West Islip, NY
- Average wind speed in May: 10mph
The windiest month (with the highest average wind speed) is January (13.6mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in May
West Islip, NY
- Average humidity in May: 78%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in May
West Islip, NY
- Average rainfall in May: 3.11"
The wettest month (with the highest rainfall) is July (3.98").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in May
West Islip, NY
- Average rainfall days in May: 16.2 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in May
West Islip, NY
- Average snowfall in May: 0"
The month with the highest snowfall is March (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
West Islip, NY
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (4.2 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
West Islip, NY
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 9h and 0min
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 48min).
Average sunshine days in May
West Islip, NY
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in May
West Islip, 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
West Islip, NY
- Average cloud cover in May: 41
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
West Islip, 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).
West Islip, New York, USA
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