The best times to visit Long Island for ideal weather are
May 7th to July 8th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Long Island Travel Guide
Weather in Long Island
Average temperatures in Long Island vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 28th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Long Island, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 84.7°F (29.3°C) with temperatures rarely dropping below 67.7°F (19.8°C) at night.
Long Island Temperatures (Fahrenheit)
Long Island Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Long Island Perceived Temperature (F)
Long Island Perceived Temperature (C)
Average Long Island Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Long Island are August, July, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early August. For example, on the week of July 30th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid February with an average of 2 days of significant precipitation the week of February 19th.
When can you find snow in Long Island? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
The graph below shows the % chance of rainy and snowy days in Long Island.
Snow on the Ground
The graph below shows the average snow on the ground in Long Island (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Long Island has some high humidity months, with other comfortably humid months. The least humid month is March (50.3% relative humidity), and the most humid month is September (66.7%).
Wind in Long Island is usually calm. The windiest month is March, followed by February and April. March’s average wind speed of around 7.8 knots (8.9 MPH or 14.4 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid February where average top sustained speeds reach 16.3 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Long Island.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||7.2||Gentle breeze||14||Significant breeze|
|Feb||7.7||Gentle breeze||15||Significant breeze|
|Mar||7.8||Gentle breeze||14.6||Significant breeze|
|Apr||7.3||Gentle breeze||14.2||Significant breeze|
|May||6.3||Light breeze||12.7||Significant breeze|
|Jun||5.8||Light breeze||11.9||Significant breeze|
|Jul||5.7||Light breeze||11.9||Significant breeze|
|Aug||5||Light breeze||11.1||Significant breeze|
|Sep||5.1||Light breeze||11.2||Significant breeze|
|Oct||5.9||Light breeze||12.4||Significant breeze|
|Nov||6.4||Light breeze||12.8||Significant breeze|
|Dec||7||Gentle breeze||14||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Long Island?
Our best data indicates this area is generally safe. As of Mar 17, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Mar 15, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Long Island, NY, US is July, followed by October and February. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Long Island in December. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Long Island Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 75.7°F (24.3°C) and 42°F (5.6°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 8 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 6 to 7 days of precipitation per month. June – August is the busiest season for tourism in Long Island, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 79.3°F (26.3°C) and 51°F (10.6°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 6 to 7 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.
Winter (December through February)
Weather is far too cold this time of year in Long Island to be enjoyable for warm weather travelers. The average high during this season is between 47.9°F (8.8°C) and 36°F (2.2°C). On average, it rains or snows a fair amount: 7 to 9 times per month. These times of year are the slowest with tourists.