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September Weather in Port Barre, United States

Last updated: June 24, 2025

In September in Port Barre, United States, the average temperature is a delightful 26°C (80°F). Visitors can expect a minimum of 13°C (55°F) and a maximum of 37°C (99°F), making it a warm month overall. However, keep an umbrella handy, as precipitation averages 121 mm (4.8 in) over 14 days. Plus, with an average humidity of 79%, it’s wise to stay hydrated and enjoy the tropical vibes!

September Temperature in Port Barre

In September in Port Barre, the average temperature is 26°C (80°F), with maximums reaching up to 37°C (99°F) and minimums dropping as low as 13°C (55°F). It's an ideal time for travelers seeking warm weather but be prepared for a range of temperatures during your visit.

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

The chart illustrates September temperature patterns in Port Barre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Barre, September typically has an average temperature of 26°C (80°F), with highs reaching up to 37°C (99°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec535864687681828279726056
Data source: Temperature data for Port Barre 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 Barre

In Port Barre in September, the precipitation amount is 121 mm (4.8 in) over a span of 14 days.

September Precipitation Trends in Port Barre

The chart displays monthly precipitation patterns in Port Barre, 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 Barre, September typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1091088215515714817817012111678113
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Port Barre

In Port Barre 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 Barre

This chart illustrates the average monthly humidity levels in Port Barre, 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 Barre 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 Barre

In Port Barre 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 Barre.

Maximum UV Index Levels in Port Barre for September

The chart shows the monthly maximum UV Index (UVI) for Port Barre 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 Barre typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121210965
Data source: Port Barre 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 Barre Compares to Other Months

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

This table compares monthly weather conditions in Port Barre, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)109 mm (4.3 inches)83%moderate
February Weather14°C (58°F)108 mm (4.3 inches)83%very high
March Weather18°C (65°F)82 mm (3.2 inches)80%very high
April Weather20°C (68°F)155 mm (6.1 inches)81%extreme
May Weather25°C (77°F)157 mm (6.2 inches)81%extreme
June Weather27°C (81°F)148 mm (5.8 inches)78%extreme
July Weather28°C (83°F)178 mm (7.0 inches)79%extreme
August Weather28°C (82°F)170 mm (6.7 inches)79%extreme
September Weather26°C (80°F)121 mm (4.8 inches)79%very high
October Weather22°C (72°F)116 mm (4.5 inches)77%very high
November Weather15°C (60°F)78 mm (3.1 inches)85%high
December Weather13°C (56°F)113 mm (4.5 inches)88%moderate

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