Gloucester
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Gloucester, MA

May, the last month of the spring, in Gloucester, is a moderate month, with temperature in the range of an average low of 49.5°F (9.7°C) and an average high of 57.7°F (14.3°C).

Temperature

In May, the average high-temperature increases, from a frosty 48.7°F (9.3°C) in April, to a moderate 57.7°F (14.3°C). In Gloucester, the average low-temperature is 49.5°F (9.7°C).

Humidity

The average relative humidity in May is 80%.

Rainfall

In Gloucester, in May, it is raining for 16.3 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, there are 150.9 rainfall days, and 30.75" (781mm) of precipitation is accumulated.

Snowfall

In Gloucester, Massachusetts, snow does not fall through October.

Ocean temperature

In May, the average ocean temperature is 48°F (8.9°C).
Note: Swimming in 48°F (8.9°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In Gloucester, the average length of the day in May is 14.6h.

Sunshine

The average sunshine in May is 8.6h.

UV index

In Gloucester, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 in May interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in May in Gloucester?

In Gloucester, Massachusetts, in May, the average high-temperature is 57.7°F (14.3°C), and the average low-temperature is 49.5°F (9.7°C).

What is the average humidity in May in Gloucester?

In Gloucester, the average relative humidity in May is 80%.

How much does it rain in Gloucester in May?

In May, in Gloucester, the rain falls for 16.3 days. Throughout May, 2.2" (56mm) of precipitation is accumulated.

Does it snow in Gloucester in May?

In May, in Gloucester, Massachusetts, it doesn't snow. April is the latest month when it typically snows.

When it does not snow in Gloucester?

May through October are months without snowfall in Gloucester, Massachusetts.

What is the ocean temperature in May in Gloucester?

In May, the average ocean temperature is 48°F (8.9°C). Swimming in 48°F (8.9°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in May in Gloucester?

The average length of the day in May in Gloucester is 14.6h.

How many hours of sunshine does Gloucester have in May?

In May, the average sunshine in Gloucester, Massachusetts, is 8.6h.

What is the UV index intensity in May in Gloucester?

The average daily maximum UV index in May in Gloucester is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in May - Gloucester, MA
  • Average high temperature in May: 57.7°F

The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is January (34.9°F).

  • Average low temperature in May: 49.5°F

The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average humidity in May - Gloucester, MA
  • Average humidity in May: 80%

The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is November (73%).

Average rainfall in May - Gloucester, MA
  • Average rainfall in May: 2.2"

The wettest month (with the highest rainfall) is December (3.23").
The driest month (with the least rainfall) is September (1.73").

Average rainfall days in May - Gloucester, MA
  • Average rainfall days in May: 16.3 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (8.2 days).

Average snowfall in May - Gloucester, MA
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.6").
Months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May - Gloucester, MA
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (7.8 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in May - Gloucester, MA
  • Average sea temperature in May: 48°F

The best month for swimming (with the highest average sea temperature) is August (66.4°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).

Average daylight in May / Average sunshine in May - Gloucester, MA
  • Average daylight in May: 14.6h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in May: 8.6h

The month with the most sunshine is August (Average sunshine: 10.8h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

Average UV index in May - Gloucester, MA
  • Average UV index in May: 5

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).