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
In Greenwich, the onset of May comes with an increased average high-temperature, moving from April's mild 55.4°F (13°C) to a comfortable 66.2°F (19°C). In May, the nighttime temperature lowers to an average of 53.1°F (11.7°C).Humidity
The months with the highest humidity in Greenwich are February, May and December, with an average relative humidity of 75%.Rainfall
In Greenwich, in May, it is raining for 17.5 days, with typically 3.11" (79mm) of accumulated precipitation. Throughout the year, in Greenwich, Connecticut, there are 165.6 rainfall days, and 37.64" (956mm) of precipitation is accumulated.Snowfall
In Greenwich, snow does not fall in May through October.Ocean temperature
In Greenwich, Connecticut, in May, the average water temperature is 51.4°F (10.8°C).Note: Beware of 51.4°F (10.8°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.
Daylight
In Greenwich, the average length of the day in May is 14h and 30min.On the first day of the month, sunrise is at 5:51 am and sunset at 7:51 pm. On the last day of May, in Greenwich, sunrise is at 5:24 am and sunset at 8:20 pm EDT.
Sunshine
The average sunshine in May is 8.7h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 suggests this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Greenwich?
What is the most humid month in Greenwich?
What is the average humidity in May in Greenwich?
How many days does it rain in May in Greenwich?
When it does not snow in Greenwich?
Does it snow in Greenwich in May?
How cold is the water in May in Greenwich?
What is the average length of the day in May in Greenwich?
What time are sunrise and sunset in May in Greenwich?
How many hours of sunshine does Greenwich have in May?
What is the UV index intensity in May in Greenwich?
Average temperature in May
Greenwich, CT
- Average high temperature in May: 66.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in May: 53.1°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in May
Greenwich, CT
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Greenwich, CT
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in May
Greenwich, CT
- Average humidity in May: 75%
The months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (71%).
Average rainfall in May
Greenwich, CT
- Average rainfall in May: 3.11"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.4").
Average rainfall days in May
Greenwich, CT
- Average rainfall days in May: 17.5 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in May
Greenwich, CT
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Greenwich, CT
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in May
Greenwich, CT
- Average sea temperature in May: 51.4°F
The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).
Average daylight in May /
Average sunshine in May
Greenwich, CT
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Greenwich, CT
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in May
Greenwich, CT
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Greenwich, CT
- Average cloud cover in May: 44
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Greenwich, CT
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Greenwich, Connecticut, USA
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