August weather forecastIslip, NY
August
Weather in August
The last month of the summer, August, is another warm month in Islip, New York, with an average temperature varying between 78.4°F (25.8°C) and 72°F (22.2°C).Temperature
August welcomes an average high-temperature of a still warm 78.4°F (25.8°C), not much different from the preceding month. Islip nights in August witness a mild cool down to an average temperature of 72°F (22.2°C).Humidity
In Islip, the average relative humidity in August is 73%.Rainfall
In Islip, during August, the rain falls for 16.3 days and regularly aggregates up to 3.35" (85mm) of precipitation. In Islip, during the entire year, the rain falls for 153.2 days and collects up to 34.45" (875mm) of precipitation.Snowfall
April through September are months without snowfall in Islip.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 73.9°F (23.3°C).Note: If you're wary of the cold, the surrounding conditions—sunshine, wind, and air temperature become crucial when swimming in 73.9°F (23.3°C) waters. Olympic standards, for reference, are set between 77°F (25°C) and 82.4°F (28°C).
Daylight
In August, the average length of the day in Islip is 13h and 45min.On the first day of the month, sunrise is at 5:50 am and sunset at 8:08 pm. On the last day of August, sunrise is at 6:19 am and sunset at 7:26 pm EDT.
Sunshine
The average sunshine in August is 10.7h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In August, an average UV index of 6 transforms into the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be wary! Reflections from sand and water make UV radiation more intense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Islip, NY
- Average high temperature in August: 78.4°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in August: 72°F
The month with the highest average low temperature is August (72°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in August
Islip, NY
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Islip, NY
- Average wind speed in August: 8.8mph
The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).
Average humidity in August
Islip, NY
- Average humidity in August: 73%
The months with the highest relative humidity are May and June (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in August
Islip, NY
- Average rainfall in August: 3.35"
The wettest month (with the highest rainfall) is July (3.86").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in August
Islip, NY
- Average rainfall days in August: 16.3 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in August
Islip, NY
- Average snowfall in August: 0"
The month with the highest snowfall is March (1.97").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in August
Islip, NY
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in August
Islip, NY
- Average sea temperature in August: 74°F
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in August /
Average sunshine in August
Islip, NY
- Average daylight in August: 13h and 42min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 10h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in August
Islip, NY
- Average sunshine days in August: 12.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in August
Islip, 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 and December (UV index 2).
Average cloud cover in August
Islip, NY
- Average cloud cover in August: 27
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
Islip, 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).
