May weather forecastMattapoisett, MA
May
Weather in May
May, the last month of the spring in Mattapoisett, is a comfortable month, with an average temperature varying between 50.7°F (10.4°C) and 62.4°F (16.9°C).Temperature
Mattapoisett experiences a temperature shift with the start of May, with average high-temperatures moving from a fresh 53.2°F (11.8°C) in April to an enjoyable 62.4°F (16.9°C). During the nights in May, the temperature averages to a cool 50.7°F (10.4°C).Humidity
In May, the average relative humidity in Mattapoisett is 78%.Rainfall
In May, the rain falls for 13.3 days. Throughout May, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 133.2 rainfall days, and 17.2" (437mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Ocean temperature
In Mattapoisett, the average seawater temperature in May is 50.4°F (10.2°C).Note: To swim in 50.4°F (10.2°C) at less than 50°F (10°C), ensure you're well-protected. Without it, be prepared for a sudden jolt of cold and breathing issues. Remember, even 55.4°F (13°C) is not welcoming.
Daylight
In Mattapoisett, the average length of the day in May is 14h and 33min.On the first day of the month, sunrise is at 5:38 am and sunset at 7:41 pm. On the last day of May, sunrise is at 5:11 am and sunset at 8:10 pm EDT.
Sunshine
In May, the average sunshine is 8.5h.UV index
In Mattapoisett, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mattapoisett, MA
- Average high temperature in May: 62.4°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (36.3°F).
- Average low temperature in May: 50.7°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in May
Mattapoisett, MA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Mattapoisett, MA
- Average wind speed in May: 9.4mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (8mph).
Average humidity in May
Mattapoisett, MA
- Average humidity in May: 78%
The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March, April and November (74%).
Average rainfall in May
Mattapoisett, MA
- Average rainfall in May: 1.5"
The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is September (1.06").
Average rainfall days in May
Mattapoisett, MA
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is July (13.4 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in May
Mattapoisett, MA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Mattapoisett, MA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (6.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in May
Mattapoisett, MA
- Average sea temperature in May: 50.4°F
The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).
Average daylight in May /
Average sunshine in May
Mattapoisett, MA
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in May
Mattapoisett, MA
- Average sunshine days in May: 15.6 days
The months with the most sunshine days are November and December (18.3 days).
The month with the least sunshine days is April (14.4 days).
Average UV index in May
Mattapoisett, MA
- 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
Mattapoisett, MA
- Average cloud cover in May: 44
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Mattapoisett, 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).
