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September Weather in Freeport, United States

Last updated: June 24, 2025

In September, the average temperature in Freeport, United States reaches a warm 26°C (80°F). Temperatures can vary, with a minimum of 15°C (60°F) and peaking at a maximum of 35°C (96°F). Expect about 145 mm (5.7 in) of precipitation spread over 16 days, contributing to an average humidity level of 79%. Enjoy the rich and varied climate!

September Temperature in Freeport

In September in Freeport, the average temperature is 26°C (80°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 15°C (60°F). This climate makes it an ideal time for travelers seeking warm weather and pleasant outdoor activities.

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

The chart illustrates September temperature patterns in Freeport, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Freeport, September typically has an average temperature of 26°C (80°F), with highs reaching up to 35°C (96°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec545964687581828279736157
Data source: Temperature data for Freeport 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 Freeport

In Freeport in September, the precipitation amount is 145 mm (5.7 in) spread over 16 days, indicating a moderately wet period for the region.

September Precipitation Trends in Freeport

The chart displays monthly precipitation patterns in Freeport, 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 Freeport, September typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec90115611299217916218014511039133
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Freeport

In Freeport 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 Freeport

This chart illustrates the average monthly humidity levels in Freeport, 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 Freeport is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Freeport

In Freeport 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 Freeport.

Maximum UV Index Levels in Freeport for September

The chart shows the monthly maximum UV Index (UVI) for Freeport 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 Freeport typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
Data source: Freeport 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 Freeport Compares to Other Months

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

This table compares monthly weather conditions in Freeport, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)90 mm (3.5 inches)83%moderate
February Weather15°C (60°F)115 mm (4.5 inches)82%very high
March Weather18°C (64°F)61 mm (2.4 inches)79%very high
April Weather20°C (68°F)129 mm (5.1 inches)77%extreme
May Weather24°C (75°F)92 mm (3.6 inches)74%extreme
June Weather27°C (81°F)179 mm (7.0 inches)70%extreme
July Weather28°C (82°F)162 mm (6.4 inches)78%extreme
August Weather28°C (82°F)180 mm (7.1 inches)78%extreme
September Weather26°C (80°F)145 mm (5.7 inches)79%very high
October Weather23°C (74°F)110 mm (4.3 inches)74%very high
November Weather16°C (61°F)39 mm (1.5 inches)83%high
December Weather14°C (57°F)133 mm (5.2 inches)86%moderate

Compare Freeport's Climate with Cities Worldwide