May weather forecast and climate
Rochester, NY

The High Falls in Rochester, New York, and the distant view of the city
The High Falls in Rochester, New York, and the distant view of the city

What is the temperature in May in Rochester?

The average high-temperature, in May, is 67.6°F (19.8°C), while the average low-temperature is 46.2°F (7.9°C).

How many days does it rain in May in Rochester?

In Rochester, in May, it is raining for 12.2 days, with typically 2.9" (72.9mm) of accumulated precipitation.

What is the last month it snows in Rochester?

May is the last month it regularly snows. During 0.2 snowfall days, in May, Rochester aggregates 0.4" (10.2mm) of snow.

What is the water temperature in May in Rochester?

In May, the average sea temperature is 42.6°F (5.9°C). Swimming in 42.6°F (5.9°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.
Average temperature in May - Rochester, NY
  • Average high temperature in May: 67.6°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.7°F).

  • Average low temperature in May: 46.3°F

The month with the highest average low temperature is July (60.7°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).

Average humidity in May - Rochester, NY
  • Average humidity in May: 67.2%

The month with the highest relative humidity is December (77.5%).
The month with the lowest relative humidity is April (67%).

Average rainfall in May - Rochester, NY
  • Average rainfall in May: 2.9"

The wettest month (with the highest rainfall) is August (3.5").
The driest month (with the lowest rainfall) is February (2").

Average rainfall days in May - Rochester, NY
  • Average rainfall days in May: 12.2 days

The month with the highest number of rainy days is January (19.4 days).
Months with the lowest number of rainy days are July and August (10.8 days).

Average snowfall in May - Rochester, NY
  • Average snowfall in May: 0.4"

The month with the highest snowfall is January (28.2").
Months with the lowest snowfall are June, July, August and September (0").

Average snowfall days in May - Rochester, NY
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (18 days).
Months with the lowest number of 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: 14.7h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in May: 8.6h

The month with most sunshine is July (Average sunshine: 10.1h).
The month with least sunshine is December (Average sunshine: 2.5h).

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