Weather in May
Temperature
In May, the meteorological conditions change with the average high-temperature moving from a moderate 55.4°F (13°C) in April to an agreeable 68°F (20°C). A noteworthy thermal contrast characterizes Greater Rochester International Airport's May nights, with temperatures averaging at a frosty 46.4°F (8°C).Rainfall
In Greater Rochester International Airport, in May, during 11 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, there are 152 rainfall days, and 31.89" (810mm) of precipitation is accumulated.Ocean temperature
In Greater Rochester International Airport, the average seawater temperature in May is 42.8°F (6°C).Note: Immersing oneself in 42.8°F (6°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
In May, the average length of the day is 14h and 41min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:12 pm. On the last day of May, sunrise is at 5:33 am and sunset at 8:43 pm EDT.
Sunshine
The average sunshine in May is 8h.UV index
The average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.Note: In May, the maximum UV index of 7 transforms into these recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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Average temperature in May
Greater Rochester International Airport, NY
- Average high temperature in May: 68°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 May: 46°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 May
Greater Rochester International Airport, NY
- Average rainfall in May: 2.8"
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 May
Greater Rochester International Airport, NY
- Average rainfall days in May: 11 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 May
Greater Rochester International Airport, NY
- Average sea temperature in May: 43°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 May /
Average sunshine in May
Greater Rochester International Airport, NY
- Average daylight in May: 14h and 4min
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 May: 8h
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 May
Greater Rochester International Airport, NY
- Average UV index in May: 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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