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
A rise in the average high-temperature is observed during May, moving from a fresh 55.2°F (12.9°C) in April to a comfortable 66.4°F (19.1°C). Chelsea experiences a steady low-temperature of 50°F (10°C) throughout May.Humidity
The average relative humidity in May is 72%.Rainfall
In Chelsea, in May, it is raining for 15.3 days, with typically 1.81" (46mm) of accumulated precipitation. In Chelsea, during the entire year, the rain falls for 141.4 days and collects up to 27.2" (691mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Chelsea aggregates 0.04" (1mm) of snow. Throughout the year, there are 29.8 snowfall days, and 15.75" (400mm) of snow is accumulated.Ocean temperature
In May, the average ocean temperature is 49.1°F (9.5°C).Note: Swimming in 49.1°F (9.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
In Chelsea, the average length of the day in May is 14h and 37min.On the first day of May, sunrise is at 5:38 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 5:09 am and sunset at 8:14 pm EDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
In Chelsea, Massachusetts, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 5 in May suggests the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Chelsea in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
How cold is the water in May?
How many hours of daylight does Chelsea have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Chelsea have in May?
How high is the UV index in May?
Average temperature in May
Chelsea, MA
- Average high temperature in May: 66.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in May: 50°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in May
Chelsea, MA
- Average pressure in May: 30.01"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
Chelsea, MA
- Average wind speed in May: 7.4mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in May
Chelsea, MA
- Average humidity in May: 72%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in May
Chelsea, MA
- Average rainfall in May: 1.81"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in May
Chelsea, MA
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in May
Chelsea, MA
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Chelsea, MA
- Average snowfall days in May: 0.1 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Chelsea, MA
- Average sea temperature in May: 49.2°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in May /
Average sunshine in May
Chelsea, MA
- Average daylight in May: 14h and 4min
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 6min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
Chelsea, MA
- Average sunshine days in May: 14.2 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in May
Chelsea, 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
Chelsea, MA
- Average cloud cover in May: 46
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Chelsea, 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).
Chelsea, Massachusetts, USA
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