May weather forecast
Greenwich, NY

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Weather in May

The last month of the spring, May, is an agreeable month in Greenwich, New York, with an average temperature ranging between min 46.8°F (8.2°C) and max 68°F (20°C).

Temperature

Greenwich sees an increase in average high-temperatures during May, moving from a fresh 54.1°F (12.3°C) in April to a pleasant 68°F (20°C). During the month of May, Greenwich anticipates a mean low-temperature of 46.8°F (8.2°C).

Humidity

In Greenwich, the average relative humidity in May is 74%.

Rainfall

In Greenwich, New York, in May, it is raining for 13.7 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 123.3 rainfall days, and 18.62" (473mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Greenwich aggregates 0.31" (8mm) of snow. Throughout the year, there are 37.3 snowfall days, and 16.57" (421mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 41min.
On the first day of the month, sunrise is at 5:46 am and sunset at 7:55 pm. On the last day of May, sunrise is at 5:17 am and sunset at 8:26 pm EDT.

Sunshine

In May, the average sunshine is 8.9h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the maximum UV index of 5 suggests these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.

Frequently asked questions

What are May temperatures?

In May, in Greenwich, the average high-temperature is 68°F (20°C), and the average low-temperature is 46.8°F (8.2°C).

What is the average humidity in May?

In Greenwich, the average relative humidity in May is 74%.

How many days does it rain in May?

In Greenwich, during May, the rain falls for 13.7 days and regularly aggregates up to 1.81" (46mm) of precipitation.

What is the last month it snows?

May is the last month it regularly snows. During 0.2 snowfall days, in May, Greenwich aggregates 0.31" (8mm) of snow.

How many hours of daylight does Greenwich have in May?

In May, the average day length is 14h and 41min.

What time are sunrise and sunset in May?

On the first day of May, sunrise is at 5:46 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:26 pm EDT.

How many hours of sunshine does Greenwich have in May?

In May, the average sunshine duration is 8.9h.

What is the month with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 5.

What is the UV index intensity in May?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Greenwich, NY

Average temperature in May - Greenwich, NY
  • Average high temperature in May: 68°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in May: 46.8°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

Average pressure in May
Greenwich, NY

Average pressure in May - Greenwich, NY
  • Average pressure in May: 29.99"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
Greenwich, NY

Average wind speed in May - Greenwich, NY
  • Average wind speed in May: 6.3mph

The windiest months (with the highest average wind speed) are January and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in May
Greenwich, NY

Average humidity in May - Greenwich, NY
  • Average humidity in May: 74%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).

Average rainfall in May
Greenwich, NY

Average rainfall in May - Greenwich, NY
  • Average rainfall in May: 1.81"

The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is March (1.1").

Average rainfall days in May
Greenwich, NY

Average rainfall days in May - Greenwich, NY
  • Average rainfall days in May: 13.7 days

The month with the highest number of rainy days is June (14.1 days).
The month with the least rainy days is January (4 days).

Average snowfall in May
Greenwich, NY

Average snowfall in May - Greenwich, NY
  • Average snowfall in May: 0.31"

The month with the highest snowfall is February (5").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Greenwich, NY

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

The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Greenwich, NY

Average daylight in May / Average sunshine in May - Greenwich, 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 and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

Average sunshine days in May
Greenwich, NY

Average sunshine days in May - Greenwich, NY
  • Average sunshine days in May: 15.1 days

The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is June (14.3 days).

Average UV index in May
Greenwich, NY

Average UV index in May - Greenwich, NY
  • Average UV index in May: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in May
Greenwich, NY

Average cloud cover in May - Greenwich, NY
  • Average cloud cover in May: 43

The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 33).

Average visibility in May
Greenwich, NY

Average visibility in May - Greenwich, NY
  • Average visibility in May: 6mi

The months with the highest visibility are January, March, April, May, October, November and December (6mi).
The months with the lowest visibility are February, June, July, August and September (5mi).

Greenwich, New York, USA

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