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September Weather in Boyanup, Australia

Last updated: August 22, 2025

In September, the average temperature in Boyanup, Australia is a comfortable 13°C (56°F). Expect a range from a chilly 3°C (38°F) at night to a pleasant 24°C (76°F) during the day. Be prepared for some rain, as precipitation averages 62 mm (2.4 in) over 10 days, paired with an average humidity level of 71%. Enjoy the unique climate of Boyanup this month!

September Temperature in Boyanup

In September in Boyanup, the average temperature is 13°C (56°F), with maximums reaching 24°C (76°F) and minimums dropping as low as 3°C (38°F). This mild climate makes it an ideal time for traveling and exploring the outdoor attractions in the area.

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

The chart illustrates September temperature patterns in Boyanup, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boyanup, September typically has an average temperature of 13°C (56°F), with highs reaching up to 24°C (76°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec717169635856545456596369
Data source: Temperature data for Boyanup 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 Boyanup

In Boyanup in September, the total precipitation amount is 62 mm (2.4 in) over a period of 10 days.

September Precipitation Trends in Boyanup

The chart displays monthly precipitation patterns in Boyanup, 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 Boyanup, September typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec83432337310512910762492815
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Boyanup

In Boyanup in September humidity is 71%. With an average temperature of 13°C (56°F), this humidity feels like a damp embrace that can make exploring the area feel a bit stifling and requires light, breathable clothing to remain comfortable while traveling.

September Average Humidity in Boyanup

This chart illustrates the average monthly humidity levels in Boyanup, 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 Boyanup is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec53%55%59%70%72%77%77%75%71%63%56%53%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Boyanup

In Boyanup 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 Boyanup.

Maximum UV Index Levels in Boyanup for September

The chart shows the monthly maximum UV Index (UVI) for Boyanup 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 Boyanup typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141411854458101214
Data source: Boyanup 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 Boyanup Compares to Other Months

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

This table compares monthly weather conditions in Boyanup, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (71°F)8 mm (0.3 inches)52%extreme
February Weather21°C (71°F)34 mm (1.3 inches)55%extreme
March Weather20°C (69°F)32 mm (1.3 inches)59%extreme
April Weather17°C (64°F)33 mm (1.3 inches)70%very high
May Weather14°C (58°F)73 mm (2.9 inches)72%moderate
June Weather13°C (56°F)105 mm (4.1 inches)77%moderate
July Weather12°C (55°F)129 mm (5.1 inches)77%moderate
August Weather12°C (54°F)107 mm (4.2 inches)75%moderate
September Weather13°C (56°F)62 mm (2.4 inches)71%very high
October Weather15°C (59°F)49 mm (1.9 inches)63%very high
November Weather17°C (63°F)28 mm (1.1 inches)56%extreme
December Weather20°C (69°F)15 mm (0.6 inches)53%extreme

Compare Boyanup's Climate with Cities Worldwide