May weather forecastNew Haven, CT
May
Weather in May
New Haven in May showcases a splendid weather transformation, stepping confidently into the warm, sunny days of late spring. The city says goodbye to April’s capricious climate, firmly embracing the utilitarian weather of May, ideal for outdoor activities. Temperatures rise encouraging locals and tourists to visit the beautiful sandy beaches. Rainfall becomes a regular natural event, enriching the city's flora and overall landscape. May bears the delightful promise of sun-filled summer days ahead.Temperature
As New Haven transitions into May, the average high-temperature shows a change, moving from a cool 54.9°F (12.7°C) in April to an enjoyable 65.1°F (18.4°C). During the nights in May, an average low-temperature of 51.4°F (10.8°C) is observed.Humidity
The months with the highest humidity in New Haven are February, May and June, with an average relative humidity of 76%.Rainfall
In New Haven, in May, it is raining for 17.2 days, with typically 2.76" (70mm) of accumulated precipitation. In New Haven, during the entire year, the rain falls for 167.2 days and collects up to 35.71" (907mm) of precipitation.Snowfall
In New Haven, snow does not fall in May through October.Ocean temperature
In May, the average ocean temperature is 52.2°F (11.2°C).Note: Dipping into 52.2°F (11.2°C) below 50°F (10°C) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 55.4°F (13°C) can be jarring.
Daylight
In May, the average length of the day is 14h and 31min.On the first day of May, sunrise is at 5:47 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 5:20 am and sunset at 8:18 pm EDT.
Sunshine
In May, the average sunshine in New Haven is 8.7h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 suggests this advice:
Be vigilant - Preventing sunburn is recommended. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
New Haven, CT
- Average high temperature in May: 65.1°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in May: 51.4°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in May
New Haven, 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
New Haven, CT
- Average wind speed in May: 7.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in May
New Haven, CT
- Average humidity in May: 76%
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in May
New Haven, CT
- Average rainfall in May: 2.76"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in May
New Haven, CT
- Average rainfall days in May: 17.2 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in May
New Haven, CT
- Average snowfall in May: 0"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
New Haven, CT
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
New Haven, CT
- Average sea temperature in May: 52.2°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 February (38.5°F).
Average daylight in May /
Average sunshine in May
New Haven, CT
- Average daylight in May: 14h and 30min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
New Haven, CT
- Average sunshine days in May: 11.9 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in May
New Haven, 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
New Haven, CT
- Average cloud cover in May: 44
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
New Haven, 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).
