United StatesAverage weather for Long Island in May
It's pleasantly warm in May in Long Island with an average temperature of 19°C. Temperatures this month range from a low of 13°C to a high of 25°C. At night, you can expect temperatures between 5°C and 13°C.
Start of May
The month of May starts in Long Island with cool temps, averaging around 16°C during the day and nights around 7°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid May
By mid-May, daytime temps rise to around 20°C, with nights around 9°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in Long Island is around 21°C, while nighttime temps are about 11°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Water temperature
The water temperature at Long Island is 24°C this month. Comfortable for a swim.
In May, there is an average of 105 mm of precipitation, spread over 8 days. Of the total precipitation, about 0,1 cm falls as snow in May. The wind speed is around 4 Bft, mostly coming from the South.
Long Island in May |
New York | ||
|---|---|---|---|
 Average temperature |
19°C | 22°C | |
 Max. temperature |
25°C | 28°C | |
| Min. temperature |
13°C | -5°C | |
 Total precipitation |
105 mm | 105 mm | |
| Rainy days |
8 days | 14 days | |
 Total snowfall |
0,1 cm | 0 cm | |
| Snowy days |
1 day | 0 days | |
April
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Long Island?
Looking for sun? May isn’t a good month to be in Long Island. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 34°C in 2017, Long Island reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 6°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 19°C.
Check out the climate of Long Island for all months and discover the best travel time
Daily Temperature in May in Long Island
This chart shows the average daily high and low temperatures in May for Long Island, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Long Island
The chart below shows the average daily precipitation in May for Long Island, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 8 days of precipitation in Long Island.
Daily Snowfall in May in Long Island
This chart shows the average daily snowfall in May in Long Island, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in May.
Daily UV index in May in Long Island
This chart shows the average daily UV index in May in Long Island, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Long Island over the years
This chart shows the average temperature in May in Long Island, measured in degrees Celsius, over the past few years.
Total precipitation in May in Long Island over the years
This chart shows the average precipitation in May in Long Island, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in May in Long Island per year
This chart shows the average snowfall in May in Long Island, measured in centimeters, over the past few years.
Daily weather in May for Long Island
Click on any day in May to get detailed info about the usual weather on that day in Long Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Long Island
Have you been to Long Island in May?
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Average weather in Long Island by month
Click on a month below to see detailed weather info for Long Island. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Long Island for all months at once
