September Weather in Youngsville, United States

Last updated: June 24, 2025

In Youngsville, United States, the average temperature in September is a warm 26°C (80°F), with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 35°C (94°F). This month also sees substantial rainfall, with an average precipitation of 125 mm (4.9 in) spread over 14 days, contributing to an overall humidity level of 79%.

September Temperature in Youngsville

In September in Youngsville, the average temperature is 26°C (80°F), with maximums reaching 35°C (94°F) and minimums dropping to 15°C (59°F). This makes it an ideal time for travelers to enjoy comfortable weather and explore the attractions without extreme heat.

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

The chart illustrates September temperature patterns in Youngsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Youngsville, September typically has an average temperature of 26°C (80°F), with highs reaching up to 35°C (94°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in Youngsville

In Youngsville in September, the precipitation amount is 125 mm (4.9 in) over the course of 14 days.

September Precipitation Trends in Youngsville

The chart displays monthly precipitation patterns in Youngsville, 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 Youngsville, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 14 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 Youngsville

In Youngsville in September, humidity is 79%. With an average temperature of 26°C (80°F), this humidity feels like an enveloping warm blanket, making travel feel slightly sluggish and prompting frequent hydration breaks to stay comfortable while exploring the sights.

September Average Humidity in Youngsville

This chart illustrates the average monthly humidity levels in Youngsville, 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 Youngsville is approximately 79%, 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 Youngsville

In Youngsville 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 Youngsville.

Maximum UV Index Levels in Youngsville for September

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

Data source: Youngsville 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 Youngsville Compares to Other Months

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

This table compares monthly weather conditions in Youngsville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	95 mm (3.7 inches)	81%	moderate
February Weather	15°C (59°F)	99 mm (3.9 inches)	81%	very high
March Weather	18°C (65°F)	66 mm (2.6 inches)	79%	very high
April Weather	21°C (69°F)	128 mm (5.0 inches)	81%	extreme
May Weather	25°C (77°F)	138 mm (5.4 inches)	77%	extreme
June Weather	27°C (82°F)	165 mm (6.5 inches)	74%	extreme
July Weather	28°C (83°F)	189 mm (7.4 inches)	74%	extreme
August Weather	28°C (83°F)	170 mm (6.7 inches)	73%	extreme
September Weather	26°C (80°F)	125 mm (4.9 inches)	79%	extreme
October Weather	23°C (73°F)	97 mm (3.8 inches)	77%	very high
November Weather	16°C (61°F)	81 mm (3.2 inches)	81%	high
December Weather	14°C (58°F)	103 mm (4.0 inches)	84%	moderate