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September Weather in Huntsville, United States

Last updated: June 24, 2025

In September, the average temperature in Huntsville, United States is a warm 27°C (80°F). Expect a range with minimums dipping to 12°C (53°F) and maximals soaring to 39°C (102°F). During this time, total precipitation reaches about 121 mm (4.8 in) over 11 days, while the average humidity lingers around 69%, adding to the tropical ambiance.

September Temperature in Huntsville

In September in Huntsville, the average temperature is 27°C (80°F). Maximums can reach 39°C (102°F) and minimums can be as low as 12°C (53°F). This climate makes Huntsville an ideal destination for travelers seeking warmth, but it's wise to pack layers for cooler evenings.

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 27°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec525564687682848480716055
Data source: Temperature data for Huntsville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Huntsville

In Huntsville in September, the total precipitation amount is 121 mm (4.8 in), which occurs over the course of 11 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 121 mm (4.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec89105801111911308214212111182116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Huntsville

In Huntsville in September, humidity is 69%. With an average temperature of 27°C (80°F), this humidity feels like a warm embrace that can leave you feeling sticky and lethargic, making it essential to stay hydrated and take frequent breaks while exploring.

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 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111121110864
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.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)89 mm (3.5 inches)79%moderate
February Weather13°C (55°F)105 mm (4.1 inches)80%very high
March Weather18°C (64°F)80 mm (3.2 inches)78%very high
April Weather20°C (68°F)111 mm (4.4 inches)79%very high
May Weather24°C (76°F)191 mm (7.5 inches)81%extreme
June Weather28°C (82°F)130 mm (5.1 inches)77%extreme
July Weather29°C (84°F)82 mm (3.2 inches)71%extreme
August Weather29°C (85°F)142 mm (5.6 inches)67%extreme
September Weather27°C (80°F)121 mm (4.8 inches)69%very high
October Weather22°C (71°F)111 mm (4.4 inches)73%very high
November Weather16°C (60°F)82 mm (3.2 inches)82%high
December Weather13°C (56°F)116 mm (4.6 inches)87%moderate

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