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
Port Jefferson registers an average high-temperature of a still warm 78.4°F (25.8°C) at the commencement of August, closely related to the preceding month. Port Jefferson, during August nights, records a temperature marginally cooler than the daytime average, at an agreeable 71.1°F (21.7°C).Humidity
In Port Jefferson, New York, the average relative humidity in August is 73%.Rainfall
In August, in Port Jefferson, the rain falls for 15.7 days. Throughout August, 3.31" (84mm) of precipitation is accumulated. Throughout the year, there are 146.8 rainfall days, and 33.78" (858mm) of precipitation is accumulated.Snowfall
In Port Jefferson, snow does not fall in April through September.Ocean temperature
The month with the warmest seawater in Port Jefferson is August, 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 Port Jefferson, New York, the average length of the day in August is 13h and 46min.On the first day of August in Port Jefferson, sunrise is at 5:49 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:25 pm EDT.
Sunshine
In Port Jefferson, the average sunshine in August is 10.5h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 6 in August interprets into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Attention! UV strength is notably upped by the reflection of sand and water.
Frequently asked questions
What are August temperatures in Port Jefferson?
What is the average humidity in August in Port Jefferson?
How many days does it rain in August in Port Jefferson?
When it does not snow in Port Jefferson?
When is the ocean warmest in Port Jefferson?
What is the water temperature in August in Port Jefferson?
What is the average length of the day in August in Port Jefferson?
What time are sunrise and sunset in August in Port Jefferson?
How many hours of sunshine does Port Jefferson have in August?
What is the month with the highest UV index in Port Jefferson?
How high is the UV index in August in Port Jefferson?
Average temperature in August
Port Jefferson, NY
- Average high temperature in August: 78.4°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in August: 71.1°F
The months with the highest average low temperature are July and August (71.1°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in August
Port Jefferson, 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
Port Jefferson, NY
- Average wind speed in August: 8.5mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in August
Port Jefferson, 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
Port Jefferson, NY
- Average rainfall in August: 3.31"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in August
Port Jefferson, NY
- Average rainfall days in August: 15.7 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in August
Port Jefferson, NY
- Average snowfall in August: 0"
The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in August
Port Jefferson, NY
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in August
Port Jefferson, 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
Port Jefferson, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in August
Port Jefferson, NY
- Average sunshine days in August: 13.3 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (13 days).
Average UV index in August
Port Jefferson, 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
Port Jefferson, NY
- Average cloud cover in August: 28
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in August
Port Jefferson, 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).
Port Jefferson, New York, USA
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