August weather forecast
Roslyn, NY

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Weather in August

August, the last month of the summer in Roslyn, is another warm month, with an average temperature varying between 70.3°F (21.3°C) and 80.4°F (26.9°C).

Temperature

August observes an average high-temperature of a still warm 80.4°F (26.9°C), marking an insignificant difference from July's 81.5°F (27.5°C). In Roslyn, the August nights cool down to an average low of 70.3°F (21.3°C).

Humidity

The months with the lowest humidity in Roslyn are August and November, with an average relative humidity of 71%.

Rainfall

In Roslyn, in August, during 16.2 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. Throughout the year, in Roslyn, there are 165.9 rainfall days, and 37.56" (954mm) of precipitation is accumulated.

Snowfall

In Roslyn, snow does not fall in May through October.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 74.1°F (23.4°C).
Note: Factor in your tolerance to cold, the sunshine, the wind, and the air's warmth, and a swim in 74.1°F (23.4°C) might be tempting. It is interesting to note that Olympians compete in 77°F (25°C) to 82.4°F (28°C) water temperatures.

Daylight

The average length of the day in August in Roslyn 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 in Roslyn is 10.6h.

UV index

The months with the highest UV index in Roslyn are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 6 during August translates into the following directions:
Shield from overexposure. Defense against sun-related harm is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
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Frequently asked questions

What are August temperatures in Roslyn?

The average high-temperature and low-temperature in Roslyn during August are 80.4°F (26.9°C) and 70.3°F (21.3°C) respectively. The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in July is computed to be 86°F (30°C).

What are the least humid months in Roslyn?

August and November, with an average relative humidity of 71%, are the least humid months in Roslyn, New York.

What is the average humidity in August in Roslyn?

In August, the average relative humidity in Roslyn, New York, is 71%.

How many days does it rain in August in Roslyn?

In Roslyn, in August, during 16.2 rainfall days, 3.54" (90mm) of precipitation is typically accumulated.

When it does not snow in Roslyn?

In Roslyn, New York, snow does not fall in May through October.

What is the month with the warmest ocean in Roslyn?

August is the month with the warmest seawater in Roslyn, New York, with an average ocean temperature of 74.1°F (23.4°C).

How warm is the water in August in Roslyn?

In August, the average ocean temperature is 74.1°F (23.4°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 74.1°F (23.4°C) water may be enjoyable.

How many hours of daylight does Roslyn have in August?

In Roslyn, the average day length in August is 13h and 45min.

What time are sunrise and sunset in August in Roslyn?

In August, on the first day of the month, sunrise is at 5:51 am and sunset at 8:10 pm. On the last day of the month, in Roslyn, sunrise is at 6:21 am and sunset at 7:28 pm EDT.

How long on average sun shines in August in Roslyn?

The average sunshine duration in August in Roslyn is 10.6h.

When is the highest UV index in Roslyn?

The months with the highest UV index in Roslyn are June through August, with an average maximum UV index of 6.

How high is the UV index in August in Roslyn?

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Roslyn, NY

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).

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Average pressure in August
Roslyn, NY

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).

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Average wind speed in August
Roslyn, NY

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).

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Average humidity in August
Roslyn, NY

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%).

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Average rainfall in August
Roslyn, NY

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").

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Average rainfall days in August
Roslyn, NY

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).

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Average snowfall in August
Roslyn, NY

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").

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Average snowfall days in August
Roslyn, NY

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).

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Average sea temperature in August
Roslyn, NY

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).

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Average daylight in August /
Average sunshine in August
Roslyn, NY

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).

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Average sunshine days in August
Roslyn, NY

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).

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Average UV index in August
Roslyn, NY

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).

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Average cloud cover in August
Roslyn, NY

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).

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Average visibility in August
Roslyn, NY

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).

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Roslyn, New York, USA

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