September Weather in Clarendon, United States

Last updated: June 24, 2025

In September, the average temperature in Clarendon, United States hovers around 23°C (73°F), offering a pleasant climate. However, temperatures can vary significantly, dipping to a minimum of 4°C (40°F) and soaring to a maximum of 38°C (100°F). Expect approximately 54 mm (2.1 in) of precipitation across 6 days, contributing to an average humidity of 72% that adds a touch of tropical warmth to your experiences.

September Temperature in Clarendon

In September in Clarendon, the average temperature is 23°C (73°F). The maximum can reach 38°C (100°F), while the minimum can drop as low as 4°C (40°F). Overall, it's a great time to visit for those who enjoy mild weather with the possibility of warm days and cooler nights.

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

The chart illustrates September temperature patterns in Clarendon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clarendon, September typically has an average temperature of 23°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Clarendon

In Clarendon in September, the total precipitation amount is 54 mm (2.1 in) over the course of 6 days.

September Precipitation Trends in Clarendon

The chart displays monthly precipitation patterns in Clarendon, 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 Clarendon, September typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 6 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 Clarendon

In Clarendon in September, humidity is 72%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel exhilarating yet slightly sticky, as the air clings to your skin and invites you to seek out cool, refreshing places to explore.

September Average Humidity in Clarendon

This chart illustrates the average monthly humidity levels in Clarendon, 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 Clarendon 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 Clarendon

In Clarendon in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Clarendon.

Maximum UV Index Levels in Clarendon for September

The chart shows the monthly maximum UV Index (UVI) for Clarendon 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 Clarendon typically reaches 10, which falls under the very high exposure category.

Data source: Clarendon 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 Clarendon Compares to Other Months

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

This table compares monthly weather conditions in Clarendon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	20 mm (0.8 inches)	75%	moderate
February Weather	4°C (40°F)	14 mm (0.5 inches)	76%	high
March Weather	11°C (52°F)	51 mm (2.0 inches)	64%	very high
April Weather	14°C (58°F)	31 mm (1.2 inches)	70%	extreme
May Weather	20°C (68°F)	83 mm (3.3 inches)	78%	extreme
June Weather	25°C (77°F)	48 mm (1.9 inches)	81%	extreme
July Weather	27°C (81°F)	31 mm (1.2 inches)	82%	extreme
August Weather	26°C (79°F)	41 mm (1.6 inches)	78%	extreme
September Weather	23°C (73°F)	54 mm (2.1 inches)	72%	very high
October Weather	15°C (59°F)	61 mm (2.4 inches)	73%	high
November Weather	9°C (49°F)	14 mm (0.6 inches)	80%	moderate
December Weather	6°C (43°F)	24 mm (1.0 inches)	81%	moderate