August weather forecastRoslyn Harbor, NY
August
Weather in August
August, the last month of the summer in Roslyn Harbor, is another warm month, with an average temperature varying between 70.3°F (21.3°C) and 80.4°F (26.9°C).Temperature
Roslyn Harbor starts August with an average high-temperature of a still warm 80.4°F (26.9°C), hinting at a minimal fluctuation from July. In August, the temperature in Roslyn Harbor drops to an average of 70.3°F (21.3°C) at night.Humidity
August and November, with an average relative humidity of 71%, are the least humid months in Roslyn Harbor, New York.Rainfall
In Roslyn Harbor, in August, it is raining for 16.2 days, with typically 3.54" (90mm) of accumulated precipitation. Throughout the year, in Roslyn Harbor, there are 165.9 rainfall days, and 37.56" (954mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Ocean temperature
With an average ocean temperature of 74.1°F (23.4°C), August is the month with the warmest seawater.Note: The cold tolerance of an individual, along with sunshine, wind, and the temperature of the environment, affects the enjoyment of swimming in 74.1°F (23.4°C) waters. (Olympic swimmers participate in waters ranging from 77°F (25°C) to 82.4°F (28°C).)
Daylight
In Roslyn Harbor, the average length of the day in August is 13h and 45min.On the first day of the month, sunrise is at 5:51 am and sunset at 8:09 pm. On the last day of August, in Roslyn Harbor, sunrise is at 6:21 am and sunset at 7:28 pm EDT.
Sunshine
In August, the average sunshine is 10.6h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Roslyn Harbor, New York. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 6 during August morphs into the following directions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Roslyn Harbor, NY
- Average high temperature in August: 80.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in August: 70.3°F
The months with the highest average low temperature are July and August (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in August
Roslyn Harbor, NY
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Roslyn Harbor, NY
- Average wind speed in August: 7.4mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in August
Roslyn Harbor, NY
- Average humidity in August: 71%
The months with the highest relative humidity are February, May and December (75%).
The months with the lowest relative humidity are August and November (71%).
Average rainfall in August
Roslyn Harbor, NY
- Average rainfall in August: 3.54"
The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in August
Roslyn Harbor, NY
- Average rainfall days in August: 16.2 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in August
Roslyn Harbor, NY
- Average snowfall in August: 0"
The month with the highest snowfall is March (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Roslyn Harbor, NY
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in August
Roslyn Harbor, NY
- Average sea temperature in August: 74.1°F
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).
Average daylight in August /
Average sunshine in August
Roslyn Harbor, NY
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 10h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in August
Roslyn Harbor, NY
- Average sunshine days in August: 12.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in August
Roslyn Harbor, NY
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Roslyn Harbor, NY
- Average cloud cover in August: 29
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in August
Roslyn Harbor, NY
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
