United StatesAverage weather for Long Island in July
It's cool to moderate in July in Long Island with an average temperature of 18°C. Temperatures this month range from a low of 16°C to a high of 19°C. At night, you can expect temperatures between 11°C and 13°C.
Start of July
The month of July starts in Long Island with mild temps, averaging around 18°C during the day and nights around 12°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid July
By mid-July, daytime temps stay steady at around 18°C, with nights around 12°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of July
By the end of July, the average daytime temperature in Long Island is around 19°C, while nighttime temps are about 13°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In July, there is an average of 129 mm of precipitation, spread over 15 days. The wind speed is around 3 Bft, mostly coming from the South.
Long Island in July |
New York | ||
|---|---|---|---|
 Average temperature |
18°C | 31°C | |
 Max. temperature |
19°C | 33°C | |
| Min. temperature |
16°C | -5°C | |
 Total precipitation |
129 mm | 160 mm | |
| Rainy days |
15 days | 18 days | |
June
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is July a good time to visit Long Island?
Looking for sun? July 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 29°C in 2018, Long Island reached the highest temperature in July over the past 10 years. The lowest daytime temperature in this month was 12°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 16°C.
Check out the climate of Long Island for all months and discover the best travel time
Daily Temperature in July in Long Island
This chart shows the average daily high and low temperatures in July 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 July in Long Island
The chart below shows the average daily precipitation in July 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 July, you can expect about 15 days of precipitation in Long Island.
Daily UV index in July in Long Island
This chart shows the average daily UV index in July 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 July in Long Island over the years
This chart shows the average temperature in July in Long Island, measured in degrees Celsius, over the past few years.
Total precipitation in July in Long Island over the years
This chart shows the average precipitation in July in Long Island, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in July for Long Island
Click on any day in July 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 July in Long Island
Have you been to Long Island in July?
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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
