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 into May is characterized by a rise in the average high-temperature, transitioning from April's cool 52.9°F (11.6°C) to a refreshing 62.2°F (16.8°C). Central Islip maintains an average of approximately a cool 54.5°F (12.5°C) during May nights, with only a minimal decrease from the daytime temperature.Humidity
May and June, with an average relative humidity of 77%, are the most humid months.Rainfall
In Central Islip, during May, the rain falls for 15.8 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, in Central Islip, there are 153.2 rainfall days, and 34.45" (875mm) of precipitation is accumulated.Snowfall
In Central Islip, snow does not fall in April through September.Daylight
The average length of the day in May in Central Islip, New York, is 14h and 28min.On the first day of May, sunrise is at 5:50 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:23 am and sunset at 8:17 pm EDT.
Sunshine
The average sunshine in May in Central Islip is 9h.UV index
The average daily maximum UV index in May in Central Islip is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during May translates into these guidelines:
Put precautions into practice - Guidance to elude sunburn is provided. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Central Islip in May?
What are the most humid months in Central Islip?
What is the average humidity in May in Central Islip?
How many days does it rain in May in Central Islip?
When it does not snow in Central Islip?
How many hours of daylight does Central Islip have in May?
When is the sunrise / sunset in May in Central Islip?
How long on average sun shines in May in Central Islip?
How high is the UV index in May in Central Islip?
Average temperature in May
Central 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: 54.5°F
The month with the highest average low temperature is August (72°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in May
Central 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
Central Islip, NY
- Average wind speed in May: 9.8mph
The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).
Average humidity in May
Central Islip, NY
- Average humidity in May: 77%
The months with the highest relative humidity are May and June (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in May
Central Islip, NY
- Average rainfall in May: 2.95"
The wettest month (with the highest rainfall) is July (3.86").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in May
Central Islip, NY
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in May
Central Islip, NY
- Average snowfall in May: 0"
The month with the highest snowfall is March (1.97").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in May
Central 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
Central Islip, 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: 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
Central Islip, NY
- Average sunshine days in May: 13.9 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in May
Central 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
Central 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
Central 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).
Central Islip, New York, USA
Weather forecast for your location
2. Allow the app to use your location