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September Weather in Gallatin, United States

Last updated: June 24, 2025

In Gallatin, United States, the average temperature in September hovers around 21°C (71°F). However, you can expect temperatures to range from a cool 6°C (44°F) to a warm 33°C (92°F). During this month, precipitation typically totals 109 mm (4.3 in) over 8 days, accompanied by a comfortable average humidity of 72%.

September Temperature in Gallatin

In September in Gallatin, the average temperature is 21°C (71°F). Maximums can reach 33°C (92°F), while minimums can be as low as 6°C (44°F). Overall, it's a great time to travel to Gallatin for pleasant weather and diverse temperature variations.

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

The chart illustrates September temperature patterns in Gallatin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gallatin, September typically has an average temperature of 21°C (71°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec283044526576797670554235
Data source: Temperature data for Gallatin 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 Gallatin

In Gallatin in September, the total precipitation amount is 109 mm (4.3 in) spread over 8 days.

September Precipitation Trends in Gallatin

The chart displays monthly precipitation patterns in Gallatin, 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 Gallatin, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec514010085178143110911091415434
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Gallatin

In Gallatin in September, humidity is 72%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, creating a thick, sultry atmosphere that can be quite heavy for traveling.

September Average Humidity in Gallatin

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

In Gallatin 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 Gallatin.

Maximum UV Index Levels in Gallatin for September

The chart shows the monthly maximum UV Index (UVI) for Gallatin 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 Gallatin typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Gallatin 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 Gallatin Compares to Other Months

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

This table compares monthly weather conditions in Gallatin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)51 mm (2.0 inches)80%moderate
February Weather-1°C (30°F)40 mm (1.6 inches)78%moderate
March Weather7°C (44°F)100 mm (3.9 inches)75%high
April Weather11°C (53°F)85 mm (3.3 inches)77%very high
May Weather18°C (65°F)178 mm (7.0 inches)82%very high
June Weather25°C (76°F)143 mm (5.6 inches)83%extreme
July Weather26°C (79°F)110 mm (4.3 inches)81%extreme
August Weather24°C (76°F)91 mm (3.6 inches)78%very high
September Weather21°C (71°F)109 mm (4.3 inches)72%very high
October Weather13°C (55°F)141 mm (5.6 inches)72%high
November Weather5°C (42°F)54 mm (2.1 inches)84%moderate
December Weather2°C (35°F)34 mm (1.3 inches)86%moderate

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