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

September weather forecast and climate
Gloucester, MA

The first month of the autumn, September, is also an enjoyable month in Gloucester, Massachusetts, with average temperature ranging between max 67.3°F (19.6°C) and min 59.9°F (15.5°C).

Temperature

In September, the average high-temperature marginally drops, from an agreeable 73°F (22.8°C) in August, to an enjoyable 67.3°F (19.6°C). In Gloucester, Massachusetts, the average low-temperature is 59.9°F (15.5°C).

Humidity

The average relative humidity in September is 78%.

Rainfall

The month with the least rainfall is September when the rain falls for 11.9 days and typically collects 1.73" (44mm) of precipitation.

Snowfall

May through October are months without snowfall.

Ocean temperature

In Gloucester, in September, the average water temperature is 62.6°F (17°C).
Note: For most, swimming in 62.6°F (17°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In September, the average length of the day is 12.5h.

Sunshine

In Gloucester, the average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index in Gloucester is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Gloucester?

The average high-temperature, in September, in Gloucester, Massachusetts, is 67.3°F (19.6°C), while the average low-temperature is 59.9°F (15.5°C).

What is the average humidity in September in Gloucester?

In September, the average relative humidity in Gloucester, Massachusetts, is 78%.

How many days does it rain in September in Gloucester?

In Gloucester, Massachusetts, during September, the rain falls for 11.9 days and regularly aggregates up to 1.73" (44mm) of precipitation.

What is the driest month in Gloucester?

The month with the least rainfall is September when the rain falls for 11.9 days and typically collects 1.73" (44mm) of precipitation.

When it does not snow in Gloucester?

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

How cold is the water in September in Gloucester?

In September, the average ocean temperature is 62.6°F (17°C). For swimming, a surface water temperature of 62.6°F (17°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Gloucester have in September?

The average length of the day in September in Gloucester, Massachusetts, is 12.5h.

How many hours of sunshine does Gloucester have in September?

In Gloucester, the average sunshine in September is 8.6h.

What is the UV index reading in September in Gloucester?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Gloucester, MA
  • Average high temperature in September: 67.3°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 September: 59.9°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 September - Gloucester, MA
  • Average humidity in September: 78%

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

Average rainfall in September - Gloucester, MA
  • Average rainfall in September: 1.73"

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 September - Gloucester, MA
  • Average rainfall days in September: 11.9 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 September - Gloucester, MA
  • Average snowfall in September: 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 September - Gloucester, MA
  • Average snowfall days in September: 0 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 September - Gloucester, MA
  • Average sea temperature in September: 62.7°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 September / Average sunshine in September - Gloucester, MA
  • Average daylight in September: 12.5h

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 September: 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 September - Gloucester, MA
  • Average UV index in September: 4

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).