September Weather in Waterford, United States

Last updated: June 24, 2025

In Waterford, United States, the average temperature in September hovers around 18°C (65°F), offering a pleasant climate. Expect minimums dipping to 5°C (41°F) and maximums peaking at 31°C (88°F). Prepare for some rain, as the area sees about 88 mm (3.4 in) of precipitation over 11 days, accompanied by a fairly high average humidity of 77%.

September Temperature in Waterford

In September in Waterford, the average temperature is 18°C (65°F). The maximum can reach 31°C (88°F), while the minimum can drop as low as 5°C (41°F). This makes it a great time to visit, as you can enjoy warm days and cool evenings.

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

The chart illustrates September temperature patterns in Waterford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterford, September typically has an average temperature of 18°C (65°F), with highs reaching up to 31°C (88°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Waterford

In Waterford in September, the precipitation amount is 88 mm (3.4 in) during 11 days, indicating a relatively wet period for the area.

September Precipitation Trends in Waterford

The chart displays monthly precipitation patterns in Waterford, 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 Waterford, September typically receives around 88 mm (3.4 inches) of precipitation spread over approximately 11 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 Waterford

In Waterford in September humidity is 77%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace that's both refreshing and slightly stifling, making it essential for travelers to stay hydrated and take frequent breaks to enjoy the vibrant surroundings without feeling overly fatigued.

September Average Humidity in Waterford

This chart illustrates the average monthly humidity levels in Waterford, 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 Waterford is approximately 77%, 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 Waterford

In Waterford 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 Waterford.

Maximum UV Index Levels in Waterford for September

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

Data source: Waterford 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 Waterford Compares to Other Months

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

This table compares monthly weather conditions in Waterford, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	104 mm (4.1 inches)	88%	moderate
February Weather	-1°C (30°F)	107 mm (4.2 inches)	88%	moderate
March Weather	2°C (36°F)	103 mm (4.1 inches)	87%	high
April Weather	8°C (46°F)	128 mm (5.1 inches)	87%	very high
May Weather	14°C (58°F)	129 mm (5.1 inches)	81%	very high
June Weather	19°C (67°F)	130 mm (5.1 inches)	83%	very high
July Weather	22°C (72°F)	145 mm (5.7 inches)	82%	very high
August Weather	21°C (70°F)	111 mm (4.4 inches)	76%	very high
September Weather	18°C (65°F)	88 mm (3.4 inches)	77%	very high
October Weather	12°C (55°F)	136 mm (5.3 inches)	82%	high
November Weather	4°C (40°F)	128 mm (5.0 inches)	89%	moderate
December Weather	1°C (33°F)	122 mm (4.8 inches)	86%	low