May weather forecastHyannis Port, MA
May
Weather in May
The last month of the spring, May, is a moderate month in Hyannis Port, Massachusetts, with an average temperature fluctuating between 50.9°F (10.5°C) and 55.4°F (13°C).Temperature
As Hyannis Port welcomes May, the average high-temperature sees a modest rise, transitioning from a chilly 47.1°F (8.4°C) in April to a refreshing 55.4°F (13°C). Hyannis Port navigates through May with a barely noticeable decrease in temperature at night, stabilizing at a cool 50.9°F (10.5°C).Humidity
In Hyannis Port, the average relative humidity in May is 83%.Rainfall
In Hyannis Port, during May, the rain falls for 14.9 days and regularly aggregates up to 2.2" (56mm) of precipitation. In Hyannis Port, during the entire year, the rain falls for 157.2 days and collects up to 31.77" (807mm) of precipitation.Snowfall
In Hyannis Port, snow does not fall in May through November.Daylight
In May, the average length of the day is 14h and 33min.On the first day of May, sunrise is at 5:36 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 5:09 am and sunset at 8:08 pm EDT.
Sunshine
In May, the average sunshine is 8.7h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In May, a daily UV index of 4 turns into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Hyannis Port, MA
- Average high temperature in May: 55.4°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in May: 50.9°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in May
Hyannis Port, MA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Hyannis Port, MA
- Average wind speed in May: 12.2mph
The windiest month (with the highest average wind speed) is January (16.5mph).
The calmest month (with the lowest average wind speed) is August (10.6mph).
Average humidity in May
Hyannis Port, MA
- Average humidity in May: 83%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is November (74%).
Average rainfall in May
Hyannis Port, MA
- Average rainfall in May: 2.2"
The wettest month (with the highest rainfall) is October (3.7").
The driest month (with the least rainfall) is August (1.73").
Average rainfall days in May
Hyannis Port, MA
- Average rainfall days in May: 14.9 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in May
Hyannis Port, MA
- Average snowfall in May: 0"
The month with the highest snowfall is March (1.93").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in May
Hyannis Port, MA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Hyannis Port, MA
- 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 12min).
- Average sunshine in May: 8h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in May
Hyannis Port, MA
- Average sunshine days in May: 14.3 days
The month with the most sunshine days is August (17.7 days).
The month with the least sunshine days is February (11.4 days).
Average UV index in May
Hyannis Port, MA
- Average UV index in May: 4
The months with the highest UV index are 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
Hyannis Port, MA
- Average cloud cover in May: 43
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Hyannis Port, MA
- 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).
