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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 comfortable 22°C (72°F), with minimums dipping to 6°C (42°F) and soaring to a maximum of 35°C (95°F). Expect about 65 mm (2.6 in) of precipitation spread over 6 days, and enjoy an average humidity of 72% that keeps the atmosphere pleasantly refreshing.

September Temperature in Huntsville

In September in Huntsville, the average temperature is 22°C (72°F). Maximums can reach 35°C (95°F), and minimums can be as low as 6°C (42°F). This makes Huntsville an ideal destination for travelers seeking pleasant weather, with warm days and cool nights for a comfortable experience.

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 (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec303245546676807672574337
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 65 mm (2.6 in) over a period of 6 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 65 mm (2.6 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec635411510421113210499651145241
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 72%. With an average temperature of 22°C (72°F), this humidity feels like you are stepping into a warm, embracing blanket, making traveling feel sweaty and slightly stifling, but the balmy weather is also quite perfect for exploring local attractions.

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 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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-1°C (30°F)63 mm (2.5 inches)80%moderate
February Weather0°C (33°F)54 mm (2.1 inches)78%moderate
March Weather7°C (46°F)114 mm (4.5 inches)75%high
April Weather12°C (54°F)104 mm (4.1 inches)77%very high
May Weather19°C (66°F)211 mm (8.3 inches)82%very high
June Weather25°C (77°F)132 mm (5.2 inches)83%extreme
July Weather26°C (80°F)104 mm (4.1 inches)81%extreme
August Weather24°C (76°F)99 mm (3.9 inches)78%very high
September Weather22°C (72°F)65 mm (2.6 inches)72%very high
October Weather14°C (57°F)114 mm (4.5 inches)72%high
November Weather6°C (43°F)52 mm (2.1 inches)84%moderate
December Weather3°C (37°F)41 mm (1.6 inches)86%moderate

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