Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average sea temperature in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
Port Jefferson notes the warmest temperatures in July, with a high average of 79.2°F (26.2°C) and a low of 71.1°F (21.7°C).Humidity
In July, the average relative humidity in Port Jefferson, New York, is 76%.Rainfall
In Port Jefferson, in July, it is raining for 16.5 days, with typically 3.54" (90mm) of accumulated precipitation. In Port Jefferson, during the entire year, the rain falls for 146.8 days and collects up to 33.78" (858mm) of precipitation.Snowfall
In Port Jefferson, snow does not fall in April through September.Ocean temperature
In July, the average ocean temperature is 72.1°F (22.3°C).Note: People sensitive to cold might find swimming in 72.1°F (22.3°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 Port Jefferson, the average length of the day in July is 14h and 46min.On the first day of July in Port Jefferson, sunrise is at 5:24 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:09 pm EDT.
Sunshine
The month with the most sunshine in Port Jefferson is July, with an average of 10.6h of sunshine.UV index
The months with the highest UV index in Port Jefferson are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 6 in July translates into this advice:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. To cut down UV radiation exposure by about half, sport a wide-brim hat. Warning! The reflection of sand and water increases the UV dose.
Frequently asked questions
What are the warmest months in Port Jefferson?
What is the average July temperature in Port Jefferson?
What is the average humidity in July in Port Jefferson?
How much does it rain in Port Jefferson in July?
When it does not snow in Port Jefferson?
What is the ocean temperature in July in Port Jefferson?
What is the average length of the day in July in Port Jefferson?
When is the sunrise / sunset in July in Port Jefferson?
What month has the most sunshine in Port Jefferson?
How many hours of sunshine does Port Jefferson have in July?
What are the months with the highest UV index in Port Jefferson?
What is the UV index reading in July in Port Jefferson?
Average temperature in July
Port Jefferson, NY
- Average high temperature in July: 79.2°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 July: 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 July
Port Jefferson, NY
- Average pressure in July: 29.95"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 July
Port Jefferson, NY
- Average wind speed in July: 8.3mph
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 July
Port Jefferson, NY
- Average humidity in July: 76%
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 July
Port Jefferson, NY
- Average rainfall in July: 3.54"
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 July
Port Jefferson, NY
- Average rainfall days in July: 16.5 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 July
Port Jefferson, NY
- Average snowfall in July: 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 July
Port Jefferson, NY
- Average snowfall days in July: 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 July
Port Jefferson, NY
- Average sea temperature in July: 72.1°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 July /
Average sunshine in July
Port Jefferson, NY
- Average daylight in July: 14h 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 July: 10h and 4min
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 July
Port Jefferson, NY
- Average sunshine days in July: 13 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 July
Port Jefferson, NY
- Average UV index in July: 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 July
Port Jefferson, NY
- Average cloud cover in July: 30
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 July
Port Jefferson, NY
- Average visibility in July: 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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