September Weather in Gloucester, United States

Last updated: June 24, 2025

In September, the average temperature in Gloucester, United States is a comfortable 25°C (78°F). You can expect a minimum of 18°C (64°F) and a maximum of 30°C (87°F). Precipitation averages 202 mm (7.9 in) over 14 days, contributing to an average humidity of 80%—perfect for those who enjoy a lush, tropical atmosphere!

September Temperature in Gloucester

In September in Gloucester, the average temperature is 25°C (78°F). Maximum temperatures can reach 30°C (87°F), while minimums can drop as low as 18°C (64°F). This pleasant climate makes Gloucester an ideal destination for travelers seeking comfortable weather and enjoyable outdoor activities.

September Weather in Gloucester: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Gloucester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gloucester, September typically has an average temperature of 25°C (78°F), with highs reaching up to 30°C (87°F) and lows dropping to around 18°C (64°F).

Data source: Temperature data for Gloucester generated using information from the Copernicus Climate Change Service.

September Precipitation in Gloucester

In Gloucester in September, the total precipitation amount is 202 mm (7.9 in) recorded over a span of 14 days.

September Precipitation Trends in Gloucester

The chart displays monthly precipitation patterns in Gloucester, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Gloucester, September typically receives around 202 mm (7.9 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Gloucester

In Gloucester in September, humidity is 80%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making every outdoor activity feel more strenuous and steaming, while also causing you to seek out shade and refreshment more frequently.

September Average Humidity in Gloucester

This chart illustrates the average monthly humidity levels in Gloucester, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Gloucester is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Gloucester

In Gloucester in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Gloucester.

Maximum UV Index Levels in Gloucester for September

The chart shows the monthly maximum UV Index (UVI) for Gloucester in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Gloucester typically reaches 9, which falls under the very high exposure category.

Data source: Gloucester September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Gloucester Compares to Other Months

Weather in Gloucester varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Gloucester, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Gloucester, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	86 mm (3.4 inches)	84%	moderate
February Weather	12°C (55°F)	140 mm (5.5 inches)	81%	high
March Weather	14°C (57°F)	85 mm (3.3 inches)	80%	very high
April Weather	17°C (64°F)	104 mm (4.1 inches)	80%	very high
May Weather	22°C (71°F)	109 mm (4.3 inches)	81%	extreme
June Weather	25°C (77°F)	145 mm (5.7 inches)	82%	extreme
July Weather	27°C (81°F)	162 mm (6.4 inches)	83%	extreme
August Weather	27°C (80°F)	194 mm (7.6 inches)	82%	very high
September Weather	25°C (78°F)	202 mm (7.9 inches)	80%	very high
October Weather	22°C (72°F)	93 mm (3.7 inches)	79%	very high
November Weather	16°C (61°F)	117 mm (4.6 inches)	83%	moderate
December Weather	13°C (56°F)	149 mm (5.8 inches)	84%	moderate