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September Weather in Port Denison, Australia

Last updated: August 22, 2025

In September, the average temperature in Port Denison, Australia hovers around 16°C (62°F). Expect minimums to dip to 6°C (43°F), while maximums can soar to 33°C (92°F). With an average humidity of 67%, you might experience a touch of mugginess. Additionally, be prepared for some rain, as precipitation amounts can reach 14 mm (0.5 in) over the course of 4 days.

September Temperature in Port Denison

In September in Port Denison, the average temperature is 16°C (62°F). Maximum temperatures can reach 33°C (92°F), while the minimum can drop to as low as 6°C (43°F). This wide temperature range suggests that travelers should come prepared for both warm days and chilly nights.

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

The chart illustrates September temperature patterns in Port Denison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Denison, September typically has an average temperature of 16°C (62°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec797977716560585861667177
Data source: Temperature data for Port Denison 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 Denison

In Port Denison in September, the precipitation amount is 14 mm (0.5 in) over a span of 4 days.

September Precipitation Trends in Port Denison

The chart displays monthly precipitation patterns in Port Denison, 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 Denison, September typically receives around 14 mm (0.5 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec1834712245253501418136
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Port Denison

In Port Denison in September, humidity is 67%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping embrace, making outdoor explorations comfortable yet slightly damp, perfect for leisurely strolls and enjoying the vibrant local culture.

September Average Humidity in Port Denison

This chart illustrates the average monthly humidity levels in Port Denison, 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 Denison is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%74%73%75%69%70%66%66%67%70%72%73%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Port Denison

In Port Denison 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 Port Denison.

Maximum UV Index Levels in Port Denison for September

The chart shows the monthly maximum UV Index (UVI) for Port Denison 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 Denison typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1514121075579121414
Data source: Port Denison 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 Denison Compares to Other Months

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

This table compares monthly weather conditions in Port Denison, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)18 mm (0.7 inches)73%extreme
February Weather26°C (79°F)34 mm (1.3 inches)74%extreme
March Weather25°C (78°F)7 mm (0.3 inches)73%extreme
April Weather22°C (72°F)12 mm (0.5 inches)75%very high
May Weather18°C (65°F)24 mm (0.9 inches)69%high
June Weather16°C (60°F)52 mm (2.0 inches)70%moderate
July Weather15°C (59°F)52 mm (2.1 inches)66%moderate
August Weather15°C (59°F)50 mm (2.0 inches)66%high
September Weather16°C (62°F)14 mm (0.5 inches)67%very high
October Weather19°C (66°F)18 mm (0.7 inches)70%extreme
November Weather22°C (71°F)13 mm (0.5 inches)72%extreme
December Weather25°C (77°F)6 mm (0.2 inches)73%extreme

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