September Weather in Saint David, United States

Last updated: June 24, 2025

In Saint David, United States, the average temperature in September hovers around 25°C (76°F), providing a pleasant climate for outdoor activities. Expect a minimum temperature of 12°C (53°F) and a maximum of 37°C (99°F), showcasing the potential for warm days. While you might enjoy the sun, prepare for occasional rain with an average precipitation of 31 mm (1.2 in) spread over 5 days. The average humidity is around 72%, adding to the tropical feel of this beautiful destination.

September Temperature in Saint David

In September in Saint David, the average temperature is 25°C (76°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 12°C (53°F). This makes it a great time for travelers to enjoy warm days and cooler evenings, perfect for exploring or relaxing outdoors.

September Weather in Saint David: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint David, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint David, September typically has an average temperature of 25°C (76°F), with highs reaching up to 37°C (99°F) and lows dropping to around 12°C (53°F).

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

September Precipitation in Saint David

In Saint David in September, the precipitation amount is 31 mm (1.2 in) spread over 5 days.

September Precipitation Trends in Saint David

The chart displays monthly precipitation patterns in Saint David, 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 Saint David, September typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 5 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 Saint David

In Saint David in September humidity is 72%. With an average temperature of 25°C (76°F), this humidity feels like a warm, enveloping blanket, making travel moments both sticky and slightly arduous, where you'll find yourself longing for cool breezes and refreshing drinks to keep you comfortable.

September Average Humidity in Saint David

This chart illustrates the average monthly humidity levels in Saint David, 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 Saint David is approximately 72%, 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 Saint David

In Saint David in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Saint David.

Maximum UV Index Levels in Saint David for September

The chart shows the monthly maximum UV Index (UVI) for Saint David 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 Saint David typically reaches 11, which falls under the extreme exposure category.

Data source: Saint David 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 Saint David Compares to Other Months

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

This table compares monthly weather conditions in Saint David, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	24 mm (0.9 inches)	74%	moderate
February Weather	10°C (49°F)	32 mm (1.2 inches)	71%	high
March Weather	13°C (57°F)	17 mm (0.7 inches)	60%	very high
April Weather	18°C (65°F)	3 mm (0.1 inches)	43%	extreme
May Weather	22°C (73°F)	3 mm (0.1 inches)	32%	extreme
June Weather	28°C (83°F)	8 mm (0.3 inches)	28%	extreme
July Weather	28°C (82°F)	65 mm (2.6 inches)	38%	extreme
August Weather	27°C (81°F)	52 mm (2.0 inches)	60%	extreme
September Weather	25°C (76°F)	31 mm (1.2 inches)	72%	extreme
October Weather	19°C (67°F)	13 mm (0.5 inches)	66%	very high
November Weather	14°C (57°F)	23 mm (0.9 inches)	74%	high
December Weather	9°C (48°F)	27 mm (1.1 inches)	81%	moderate