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
The transition into August reveals an average high-temperature of a still warm 78.4°F (25.8°C), mirroring a close resemblance to July. In Stony Brook, nights during August observe an average temperature decrease to an agreeable 71.1°F (21.7°C).Humidity
In Stony Brook, the average relative humidity in August is 73%.Rainfall
In Stony Brook, in August, during 15.7 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. Throughout the year, there are 146.8 rainfall days, and 33.78" (858mm) of precipitation is accumulated.Snowfall
April through September are months without snowfall.Ocean temperature
The month with the warmest seawater is August, with an average ocean temperature of 73.9°F (23.3°C).Note: For someone not comfortable with cold, swimming in 73.9°F (23.3°C) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.
Daylight
The average length of the day in August is 13h and 46min.On the first day of the month, sunrise is at 5:49 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 10.5h.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 hazard from exposure to the Sun's UV radiation for the ordinary person.Note: During August, 6 as the daily maximum UV index converts into the following advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Watch out! Reflections from sand and water can surge UV radiation exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average August temperature?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the month with the warmest ocean?
How warm is the water in August?
How many hours of daylight does Stony Brook have in August?
What time are sunrise and sunset in August?
How long on average sun shines in August?
What are the months with the highest UV index?
What is the UV index reading in August?
Average temperature in August
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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
Stony Brook, 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).
Stony Brook, New York, USA
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