September Weather in Nacogdoches, United States

Last updated: June 24, 2025

In Nacogdoches, United States, the average temperature in September hovers around 26°C (80°F). Expect a range that can dip to a cool 12°C (53°F) and reach a sweltering 39°C (103°F). During this period, you might encounter 115 mm (4.5 in) of precipitation spread across 11 days, contributing to an average humidity level of 72%.

September Temperature in Nacogdoches

In September in Nacogdoches, the average temperature is 26°C (80°F). Maximums can reach 39°C (103°F) and minimums can be as low as 12°C (53°F). Be prepared for warm days and cooler nights while exploring all that Nacogdoches has to offer.

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

The chart illustrates September temperature patterns in Nacogdoches, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nacogdoches, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (103°F) and lows dropping to around 12°C (53°F).

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

September Precipitation in Nacogdoches

In Nacogdoches in September, the total precipitation amount is 115 mm (4.5 in) spread over 11 days.

September Precipitation Trends in Nacogdoches

The chart displays monthly precipitation patterns in Nacogdoches, 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 Nacogdoches, September typically receives around 115 mm (4.5 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 Nacogdoches

In Nacogdoches in September, humidity is 72%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace, making traveling feel a bit heavier, yet invigorating as you navigate the vibrant atmosphere, surrounded by the rich scents and lively sounds of the locale.

September Average Humidity in Nacogdoches

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

In Nacogdoches 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 Nacogdoches.

Maximum UV Index Levels in Nacogdoches for September

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

Data source: Nacogdoches 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 Nacogdoches Compares to Other Months

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

This table compares monthly weather conditions in Nacogdoches, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	101 mm (4.0 inches)	81%	moderate
February Weather	12°C (54°F)	137 mm (5.4 inches)	81%	high
March Weather	17°C (63°F)	113 mm (4.4 inches)	79%	very high
April Weather	19°C (67°F)	157 mm (6.2 inches)	80%	very high
May Weather	24°C (75°F)	149 mm (5.9 inches)	81%	extreme
June Weather	27°C (81°F)	124 mm (4.9 inches)	76%	extreme
July Weather	29°C (84°F)	91 mm (3.6 inches)	73%	extreme
August Weather	29°C (84°F)	125 mm (4.9 inches)	71%	extreme
September Weather	26°C (80°F)	115 mm (4.5 inches)	72%	very high
October Weather	21°C (70°F)	105 mm (4.1 inches)	73%	very high
November Weather	15°C (59°F)	81 mm (3.2 inches)	83%	high
December Weather	12°C (54°F)	121 mm (4.8 inches)	88%	moderate