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
On the advent of August, Port Jefferson's average high-temperature exhibits a minor adjustment to a still moderately hot 78.4°F (25.8°C) from July's 79.2°F (26.2°C). Night temperatures during August stabilize at an average of 71.1°F (21.7°C), closely mirroring the daytime temperatures.Humidity
In August, the average relative humidity in Port Jefferson is 73%.Rainfall
In Port Jefferson, in August, it is raining for 15.7 days, with typically 3.31" (84mm) of accumulated precipitation. In Port Jefferson, New York, during the entire year, the rain falls for 146.8 days and collects up to 33.78" (858mm) of precipitation.Snowfall
April through September are months without snowfall in Port Jefferson.Ocean temperature
With an average ocean temperature of 73.9°F (23.3°C), August is the month with the warmest seawater.Note: People sensitive to cold might find swimming in 73.9°F (23.3°C) challenging. However, conditions like sunshine, wind, and ambient temperature play a significant role in the overall comfort. Wetsuits, while optional, might be beneficial.
Daylight
In August, the average length of the day is 13h and 46min.On the first day of August, 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 August, the average sunshine is 10.5h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 6 in August translates into the following instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What month is the ocean warmest in Port Jefferson?
How warm is the water in August?
How many hours of daylight does Port Jefferson have in August?
When is the sunrise / sunset in August?
How many hours of sunshine does Port Jefferson have in August?
When is the highest UV index?
How high is the UV index in August?
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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