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United StatesThe weather in August in Long Island
It's warm in August in Long Island with an average temperature of 26°C. Temperatures this month range from a low of 24°C to a high of 29°C. At night, you can expect temperatures between 15°C and 19°C.
Looking for sun? August 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 August 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 36°C in 2016, Long Island reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 18°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 8°C to a highest value of 24°C.
Water temperature
The water temperature at Long Island is 25°C this month. Lovely temperature for a swim.
Rainfall amount
In August, there is an average of 120 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in August for Long Island
Click on any day in August 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.
August weather comparison
| Long Island | New York | |
|---|---|---|
| Average temperature | 26°C | 30°C |
| Max. temperature | 29°C | 31°C |
| Min. temperature | 15°C | -5°C |
| Total precipitation | 120 mm | 79 mm |
| Rainy days | 13 days | 13 days |
Start of August
The month of August starts in Long Island with hot temps, averaging around 28°C during the day and nights around 18°C.
Mid August
By mid-August, daytime temps drop to around 27°C, with nights around 18°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of August
By the end of August, the average daytime temperature in Long Island is around 26°C, while nighttime temps are about 17°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 August 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 August in Long Island
Temperature in August in Long Island over the years
Precipitation charts
These charts show the average amount of precipitation in August 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 August in Long Island
Total precipitation in August in Long Island over the years
Daily UV index in August in Long Island
This chart shows the average daily UV index in August 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 August 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.