Weather in August
Temperature
August's onset records an average high-temperature of a still moderately hot 78.8°F (26°C), a near match to July's 80.6°F (27°C). Greater Rochester International Airport, in August, witnesses an average low-temperature of 59°F (15°C).Rainfall
The month with the most rainfall is August, when the rain falls for 10 days and typically aggregates up to 3.27" (83mm) of precipitation.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 69.8°F (21°C).Note: For most individuals, swimming in 69.8°F (21°C) is not enjoyable. As the water temperature decreases from 69.8°F (21°C) to 59°F (15°C), breathing control becomes increasingly difficult.
Daylight
In Greater Rochester International Airport, the average length of the day in August is 13h and 53min.On the first day of August, sunrise is at 6:02 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:46 pm EDT.
Sunshine
In Greater Rochester International Airport, the average sunshine in August is 9h.UV index
In Greater Rochester International Airport, the average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 7 during August translates into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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Average temperature in August
Greater Rochester International Airport, NY
- Average high temperature in August: 79°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in August: 59°F
The months with the highest average low temperature are July and August (59°F).
The coldest months (with the lowest average low temperature) are January and February (16°F).
Average rainfall in August
Greater Rochester International Airport, NY
- Average rainfall in August: 3.3"
The wettest month (with the highest rainfall) is August (3.3").
The driest months (with the least rainfall) are January and February (2").
Average rainfall days in August
Greater Rochester International Airport, NY
- Average rainfall days in August: 10 days
The month with the highest number of rainy days is December (17 days).
The month with the least rainy days is July (9 days).
Average sea temperature in August
Greater Rochester International Airport, NY
- Average sea temperature in August: 70°F
The best month for swimming (with the highest average sea temperature) is August (70°F).
The coldest months (with the lowest average sea temperature) are February and March (36°F).
Average daylight in August /
Average sunshine in August
Greater Rochester International Airport, NY
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 9h
The months with the most sunshine are June and July (Average sunshine: 10h).
The months with the least sunshine are January, November and December (Average sunshine: 3h).
Average UV index in August
Greater Rochester International Airport, NY
- Average UV index in August: 7
The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are January and December (UV index 1).
Greater Rochester International Airport, New York, USA
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