nomadseason

September Weather in Freeport, United States

Last updated: June 24, 2025

In September, the average temperature in Freeport, United States hovers around 19°C (67°F), creating a mild and pleasant climate. Temperatures can range from a cool 4°C (39°F) at night to a warm 33°C (92°F) during the day. Expect 126 mm (4.9 in) of precipitation over approximately 10 days, with an average humidity of 67%, ensuring a refreshing atmosphere.

September Temperature in Freeport

In September in Freeport, the average temperature is 19°C (67°F). The maximum can reach 33°C (92°F) and the minimum can be as low as 4°C (39°F). This diverse range of temperatures makes Freeport a suitable destination for travelers seeking both warm and cooler weather experiences.

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 19°C (67°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec303440506169747266564135
Data source: Temperature data for Freeport generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 126 mm (4.9 in) distributed over a span of 10 days.

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 126 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec991241071341581461549812613098101
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Freeport

In Freeport in September, humidity is 67%. With an average temperature of 19°C (67°F), this humidity feels like walking through a warm, soft blanket, making sightseeing and outdoor activities a bit more challenging but still enjoyable for those prepared with light clothing and plenty of hydration.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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 Weather-1°C (30°F)99 mm (3.9 inches)89%moderate
February Weather1°C (34°F)124 mm (4.9 inches)90%moderate
March Weather5°C (41°F)107 mm (4.2 inches)89%high
April Weather10°C (51°F)134 mm (5.3 inches)88%very high
May Weather16°C (62°F)158 mm (6.2 inches)80%very high
June Weather21°C (69°F)146 mm (5.7 inches)79%very high
July Weather23°C (74°F)154 mm (6.1 inches)74%very high
August Weather22°C (72°F)98 mm (3.9 inches)64%very high
September Weather19°C (67°F)126 mm (4.9 inches)67%very high
October Weather13°C (56°F)130 mm (5.1 inches)81%high
November Weather5°C (41°F)98 mm (3.9 inches)89%moderate
December Weather2°C (35°F)101 mm (4.0 inches)88%low

Compare Freeport's Climate with Cities Worldwide