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
May in Old Greenwich comes with an increase, with the average high-temperature moving from a refreshing 55.4°F (13°C) in April to a comfortable 65.8°F (18.8°C). Old Greenwich's nighttime temperature during May is consistently averaged at a cool 53.2°F (11.8°C).Humidity
The months with the highest humidity in Old Greenwich are February, May, June and December, with an average relative humidity of 75%.Rainfall
In Old Greenwich, in May, during 17.4 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, in Old Greenwich, Connecticut, there are 166.6 rainfall days, and 38.07" (967mm) of precipitation is accumulated.Snowfall
In Old Greenwich, snow does not fall in May through October.Ocean temperature
In Old Greenwich, in May, the average water temperature is 51.4°F (10.8°C).Note: Swimming in 51.4°F (10.8°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
In Old Greenwich, the average length of the day in May is 14h and 29min.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 Old Greenwich, sunrise is at 5:24 am and sunset at 8:19 pm EDT.
Sunshine
The average sunshine in May in Old Greenwich is 8.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 5 suggests this advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What is the temperature in May in Old Greenwich?
What are the most humid months in Old Greenwich?
What is the average humidity in May in Old Greenwich?
How many days does it rain in May in Old Greenwich?
When it does not snow in Old Greenwich?
Does it snow in Old Greenwich in May?
What is the water temperature in May in Old Greenwich?
How many hours of daylight does Old Greenwich have in May?
When are sunrise and sunset in May in Old Greenwich?
How long on average sun shines in May in Old Greenwich?
How high is the UV index in May in Old Greenwich?
Average temperature in May
Old Greenwich, CT
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in May: 53.2°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in May
Old Greenwich, CT
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Old Greenwich, CT
- Average wind speed in May: 7.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in May
Old Greenwich, CT
- Average humidity in May: 75%
The months with the highest relative humidity are February, May, June and December (75%).
The month with the lowest relative humidity is August (71%).
Average rainfall in May
Old Greenwich, CT
- Average rainfall in May: 3.11"
The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.44").
Average rainfall days in May
Old Greenwich, CT
- Average rainfall days in May: 17.4 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in May
Old Greenwich, CT
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Old Greenwich, CT
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in May
Old 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
Old 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 months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in May
Old Greenwich, CT
- Average sunshine days in May: 11.7 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in May
Old 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
Old 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
Old 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).
Old Greenwich, Connecticut, USA
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