September Weather in Harbor, United States

Last updated: June 24, 2025

In Harbor, United States, the average temperature in September hovers around 17°C (63°F), providing a comfortable climate for outdoor activities. However, temperatures can vary, with a minimum of 9°C (49°F) and a maximum reaching up to 32°C (89°F). Expect an average precipitation of 59 mm (2.3 in) spread over 5 days, alongside a relatively high average humidity of 62%. Whether you're looking for sun or a refreshing shower, Harbor has something for everyone this time of year!

September Temperature in Harbor

In September in Harbor, the average temperature is 17°C (63°F). Maximum temperatures can reach 32°C (89°F), while minimums can dip as low as 9°C (49°F). It's a great time for travelers to enjoy mild weather and comfortable conditions for outdoor activities.

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

The chart illustrates September temperature patterns in Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harbor, September typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (89°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Harbor

In Harbor in September, the precipitation amount is 59 mm (2.3 in) over the course of 5 days.

September Precipitation Trends in Harbor

The chart displays monthly precipitation patterns in Harbor, 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 Harbor, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 5 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Harbor

In Harbor in September humidity is 62%. With an average temperature of 17°C (63°F), this humidity feels like a refreshing embrace, making it pleasant for traveling as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Harbor

This chart illustrates the average monthly humidity levels in Harbor, 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 Harbor is approximately 62%, 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 Harbor

In Harbor in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Harbor.

Maximum UV Index Levels in Harbor for September

The chart shows the monthly maximum UV Index (UVI) for Harbor 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 Harbor typically reaches 8, which falls under the very high exposure category.

Data source: Harbor 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 Harbor Compares to Other Months

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

This table compares monthly weather conditions in Harbor, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	301 mm (11.8 inches)	86%	moderate
February Weather	9°C (48°F)	270 mm (10.6 inches)	85%	moderate
March Weather	9°C (48°F)	207 mm (8.1 inches)	85%	high
April Weather	11°C (52°F)	165 mm (6.5 inches)	82%	very high
May Weather	13°C (55°F)	68 mm (2.7 inches)	81%	very high
June Weather	16°C (61°F)	36 mm (1.4 inches)	79%	very high
July Weather	18°C (65°F)	1 mm (0.0 inches)	70%	very high
August Weather	19°C (66°F)	4 mm (0.2 inches)	60%	very high
September Weather	17°C (63°F)	59 mm (2.3 inches)	62%	very high
October Weather	14°C (58°F)	93 mm (3.7 inches)	72%	high
November Weather	11°C (53°F)	213 mm (8.4 inches)	87%	moderate
December Weather	9°C (49°F)	237 mm (9.3 inches)	86%	low