Weathermondo.com
United StatesThe weather in May in Long Island
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.
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.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Long Island, Maine. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
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.
Water temperature
The water temperature at Long Island is 24°C this month. Comfortable for a swim.
Precipitation and snowfall
In May, there is an average of 105 mm of precipitation, spread over 14 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.
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.
May weather comparison
| Long Island | New York | |
|---|---|---|
| Average temperature | 19°C | 22°C |
| Max. temperature | 25°C | 28°C |
| Min. temperature | 5°C | -5°C |
| Total precipitation | 105 mm | 105 mm |
| Rainy days | 14 days | 14 days |
| Total snowfall | 0,1 cm | 0 cm |
| Snowy days | 1 day | 0 days |
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.
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.
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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.
Check out the climate of Long Island for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Long Island, Maine. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Long Island
Temperature in May in Long Island over the years
Precipitation charts
These charts show the average amount of precipitation in May in Long Island, Maine. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Long Island
Total precipitation in May in Long Island over the years
Daily Snowfall in May in Long Island
Snowfall in May in Long Island per year
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.
Weather experiences in May in Long Island
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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.