Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The onset of August brings with it an average high-temperature of a still moderately hot 80.4°F (26.9°C), showing a negligible variation from the month before. Throughout August, Roslyn witnesses a consistent average low-temperature of 70.3°F (21.3°C).Humidity
August and November, with an average relative humidity of 71%, are the least humid months.Rainfall
In August, the rain falls for 16.2 days. Throughout August, 3.54" (90mm) of precipitation is accumulated. Throughout the year, 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: For someone sensitive to cold, swimming in 74.1°F (23.4°C) waters can be invigorating, especially when considering elements like sunshine, wind, and current air temperature. (As a reference, Olympic swimming waters are kept between 77°F (25°C) and 82.4°F (28°C).)
Daylight
In Roslyn, the average length of the day in August is 13h and 45min.On the first day of August, sunrise is at 5:51 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:28 pm EDT.
Sunshine
The average sunshine in August 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. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In August, the maximum UV index of 6 suggests this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be attentive! The UV exposure is heightened with reflections from sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in August?
What is the least humid month?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the month with the warmest ocean?
What is the ocean temperature in August?
How many hours of daylight does Roslyn have in August?
When are sunrise and sunset in August?
How many hours of sunshine does Roslyn have in August?
What is the month with the highest UV index?
How high is the UV index in August?
Average temperature in August
Roslyn, 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, 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, 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, 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, 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, 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, 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, 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, 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, NY
- Average daylight in August: 13h and 5min
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 4min
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, 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, 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, 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, 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).
Roslyn, New York, USA
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