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September Weather in Huntsville, United States

Last updated: June 24, 2025

In September, the average temperature in Huntsville, United States hovers around 15°C (60°F). Expect a wide range, with minimums dipping as low as -3°C (26°F) and maximums soaring to 33°C (91°F). During this month, rainfall averages 37 mm (1.5 in) over approximately 5 days, while the average humidity remains a comfortable 46%.

September Temperature in Huntsville

In September in Huntsville, the average temperature is 15°C (60°F). Maximum temperatures can reach 33°C (91°F), while minimum temperatures can drop as low as -3°C (26°F). This varied climate makes Huntsville an interesting destination for travelers looking to experience a range of weather conditions.

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 15°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec242735405063726959433423
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 precipitation amount is 37 mm (1.5 in) spread over a period of 5 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 37 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec718868716823202637535664
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 46%. With an average temperature of 15°C (60°F), this humidity feels like a crisp, refreshing breeze that can be invigorating for travelers, making outdoor activities enjoyable without feeling too sticky or uncomfortable.

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 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35811111212119653
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 Weather-4°C (24°F)70 mm (2.8 inches)91%moderate
February Weather-3°C (27°F)88 mm (3.5 inches)92%moderate
March Weather2°C (36°F)68 mm (2.7 inches)84%very high
April Weather5°C (41°F)71 mm (2.8 inches)74%extreme
May Weather10°C (51°F)68 mm (2.7 inches)62%extreme
June Weather17°C (63°F)23 mm (0.9 inches)56%extreme
July Weather22°C (72°F)20 mm (0.8 inches)44%extreme
August Weather21°C (69°F)26 mm (1.0 inches)37%extreme
September Weather15°C (60°F)37 mm (1.5 inches)46%very high
October Weather6°C (43°F)53 mm (2.1 inches)67%high
November Weather1°C (34°F)56 mm (2.2 inches)84%moderate
December Weather-5°C (24°F)64 mm (2.5 inches)88%moderate

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