September Weather in Huntsville, United States

Last updated: June 24, 2025

In September, the average temperature in Huntsville, United States is a pleasant 22°C (71°F). However, be prepared for variations, as temperatures can drop to a minimum of 8°C (47°F) or soar to a maximum of 35°C (94°F). You'll also experience 107 mm (4.2 in) of precipitation over approximately 10 days, contributing to an average humidity of 67%. Perfect for those who enjoy a little moisture in the air!

September Temperature in Huntsville

In September in Huntsville, the average temperature is 22°C (71°F). Maximum temperatures can reach 35°C (94°F), while minimum temperatures can drop to as low as 8°C (47°F). This diverse climate makes Huntsville an ideal destination for travelers seeking a range of outdoor activities and comfortable weather.

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

The chart illustrates September temperature patterns in Huntsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Huntsville, September typically has an average temperature of 22°C (71°F), with highs reaching up to 35°C (94°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Huntsville

In Huntsville in September, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

September Precipitation Trends in Huntsville

The chart displays monthly precipitation patterns in Huntsville, 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 Huntsville, September typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 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 Huntsville

In Huntsville in September, humidity is 67%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet slightly uncomfortable, as the air hangs thick, reminding travelers to stay hydrated and seek shade during the midday sun.

September Average Humidity in Huntsville

This chart illustrates the average monthly humidity levels in Huntsville, 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 Huntsville is approximately 67%, 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 Huntsville

In Huntsville in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Huntsville.

Maximum UV Index Levels in Huntsville for September

The chart shows the monthly maximum UV Index (UVI) for Huntsville 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 Huntsville typically reaches 9, which falls under the very high exposure category.

Data source: Huntsville 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 Huntsville Compares to Other Months

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

This table compares monthly weather conditions in Huntsville, 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)	98 mm (3.8 inches)	88%	moderate
February Weather	7°C (44°F)	182 mm (7.2 inches)	88%	high
March Weather	10°C (50°F)	149 mm (5.8 inches)	87%	very high
April Weather	14°C (57°F)	148 mm (5.8 inches)	84%	very high
May Weather	20°C (67°F)	131 mm (5.1 inches)	84%	extreme
June Weather	23°C (73°F)	125 mm (4.9 inches)	83%	extreme
July Weather	25°C (77°F)	118 mm (4.7 inches)	79%	extreme
August Weather	24°C (75°F)	140 mm (5.5 inches)	66%	very high
September Weather	22°C (71°F)	107 mm (4.2 inches)	67%	very high
October Weather	16°C (61°F)	130 mm (5.1 inches)	76%	high
November Weather	8°C (47°F)	74 mm (2.9 inches)	89%	moderate
December Weather	6°C (43°F)	136 mm (5.3 inches)	88%	moderate