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
During the warmest month, July, temperatures average a high of 79.2°F (26.2°C) and a low of 71.1°F (21.7°C).Humidity
The average relative humidity in July is 76%.Rainfall
In Stony Brook, in July, during 16.5 rainfall days, 3.54" (90mm) of precipitation is typically accumulated. Throughout the year, there are 146.8 rainfall days, and 33.78" (858mm) of precipitation is accumulated.Snowfall
In Stony Brook, snow does not fall in April through September.Ocean temperature
In July, the average ocean temperature is 72.1°F (22.3°C).Note: Given an individual's cold sensitivity, considering factors like sunshine, wind, and air temperature, a brief swim in 72.1°F (22.3°C) water might be pleasurable. (FYI: The standard water temperature for Olympic swimming contests is 77°F (25°C) to 82.4°F (28°C).)
Daylight
The average length of the day in July in Stony Brook is 14h and 46min.On the first day of July in Stony Brook, 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
With an average of 10.6h of sunshine, July has the most sunshine of the year in Stony Brook, New York.UV index
The months with the highest UV index in Stony Brook are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.Note: The UV index of 6 in July translates into these instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Warning! Sand and water reflections boost the intensity of UV exposure.
Frequently asked questions
What month is the hottest in Stony Brook?
What is the average July temperature in Stony Brook?
What is the average humidity in July in Stony Brook?
How many days does it rain in July in Stony Brook?
When it does not snow in Stony Brook?
What is the ocean temperature in July in Stony Brook?
What is the average length of the day in July in Stony Brook?
What time are sunrise and sunset in July in Stony Brook?
What month has the most sunshine in Stony Brook?
How long on average sun shines in July in Stony Brook?
What is the month with the highest UV index in Stony Brook?
What is the UV index intensity in July in Stony Brook?
Average temperature in July
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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).
Stony Brook, New York, USA
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