Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The rise of average high-temperatures is seen in May in Rochester, with an increase from a cool 51.4°F (10.8°C) in April to an enjoyable 63.9°F (17.7°C). Rochester reports an average nighttime low-temperature of 48°F (8.9°C) in May.Humidity
In May, the average relative humidity is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 16.8 days and typically aggregates up to 2.99" (76mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.4 snowfall days, in May, Rochester aggregates 0.35" (9mm) of snow. In Rochester, during the entire year, snow falls for 70.9 days and aggregates up to 27.44" (697mm) of snow.Ocean temperature
In Rochester, in May, the average water temperature is 42.6°F (5.9°C).Note: It is advised against swimming in 42.6°F (5.9°C) when it drops below 50°F (10°C). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
In May, the average length of the day is 14h and 41min.On the first day of May in Rochester, sunrise is at 6:02 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:43 pm EDT.
Sunshine
In May, the average sunshine in Rochester is 9.3h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In May, the maximum UV index of 5 translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What are May temperatures in Rochester?
What is the average humidity in May in Rochester?
What is the wettest month in Rochester?
How many days does it rain in May in Rochester?
What is the last month it snows in Rochester?
How cold is the water in May in Rochester?
How many hours of daylight does Rochester have in May?
When are sunrise and sunset in May in Rochester?
How many hours of sunshine does Rochester have in May?
How high is the UV index in May in Rochester?
Average temperature in May
Rochester, NY
- Average high temperature in May: 63.9°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in May: 48°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in May
Rochester, NY
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Rochester, NY
- Average wind speed in May: 8mph
The windiest month (with the highest average wind speed) is January (11.6mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in May
Rochester, NY
- Average humidity in May: 78%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are August and September (76%).
Average rainfall in May
Rochester, NY
- Average rainfall in May: 2.99"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in May
Rochester, NY
- Average rainfall days in May: 16.8 days
The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in May
Rochester, NY
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (7.01").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Rochester, NY
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Rochester, NY
- Average sea temperature in May: 42.7°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is March (35.8°F).
Average daylight in May /
Average sunshine in May
Rochester, 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: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 2h and 42min).
Average sunshine days in May
Rochester, NY
- Average sunshine days in May: 12.6 days
The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in May
Rochester, NY
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Rochester, NY
- Average cloud cover in May: 39
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Rochester, NY
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Rochester, New York, USA
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