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September Weather in Port Gibson, United States

Last updated: June 24, 2025

In Port Gibson, United States, the average temperature in September hovers around 26°C (80°F), offering a pleasant climate. However, be prepared for temperature fluctuations, with a minimum of 11°C (53°F) to a scorching maximum of 39°C (103°F). Rainfall is not uncommon, as 82 mm (3.2 in) of precipitation typically falls over 8 days. The average humidity also sits at a notable 79%, creating a warm and somewhat sticky atmosphere.

September Temperature in Port Gibson

In September in Port Gibson, the average temperature is 26°C (80°F). Maximums can reach 39°C (103°F) and minimums can be as low as 11°C (53°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both light clothing for the heat and warmer layers for cooler evenings.

September Weather in Port Gibson: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Port Gibson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Gibson, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (103°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec505462657480828279705653
Data source: Temperature data for Port Gibson 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 Port Gibson

In Port Gibson in September, the total precipitation amount reached 82 mm (3.2 in) over the course of 8 days.

September Precipitation Trends in Port Gibson

The chart displays monthly precipitation patterns in Port Gibson, 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 Port Gibson, September typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec113151121168140127991158210786117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Port Gibson

In Port Gibson in September, humidity is 79%. With an average temperature of 26°C (80°F), this humidity feels like an enveloping warm blanket, making travel feel slightly sluggish and prompting frequent hydration breaks to stay comfortable while exploring the sights.

September Average Humidity in Port Gibson

This chart illustrates the average monthly humidity levels in Port Gibson, 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 Port Gibson is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Port Gibson

In Port Gibson 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 Port Gibson.

Maximum UV Index Levels in Port Gibson for September

The chart shows the monthly maximum UV Index (UVI) for Port Gibson 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 Port Gibson typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111112121110864
Data source: Port Gibson 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 Port Gibson Compares to Other Months

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

This table compares monthly weather conditions in Port Gibson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)113 mm (4.5 inches)83%moderate
February Weather12°C (55°F)151 mm (5.9 inches)83%high
March Weather17°C (62°F)121 mm (4.7 inches)80%very high
April Weather19°C (66°F)168 mm (6.6 inches)81%extreme
May Weather24°C (75°F)140 mm (5.5 inches)81%extreme
June Weather27°C (80°F)127 mm (5.0 inches)78%extreme
July Weather28°C (83°F)99 mm (3.9 inches)79%extreme
August Weather28°C (82°F)115 mm (4.5 inches)79%extreme
September Weather26°C (80°F)82 mm (3.2 inches)79%very high
October Weather21°C (70°F)107 mm (4.2 inches)77%very high
November Weather14°C (57°F)86 mm (3.4 inches)85%high
December Weather12°C (53°F)117 mm (4.6 inches)88%moderate

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