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September Weather in Kojonup, Australia

Last updated: August 22, 2025

In September, the average temperature in Kojonup, Australia hovers around 12°C (53°F), offering a mild climate for visitors. Temperatures can vary, with a minimum of 0°C (31°F) and a maximum reaching 27°C (81°F), making it essential to be prepared for all conditions. Rainfall is moderate, with 39 mm (1.5 in) of precipitation expected over approximately 6 days, and an average humidity of 71% adds to the overall atmosphere.

September Temperature in Kojonup

In September in Kojonup, the average temperature is 12°C (53°F). The maximum can reach 27°C (81°F) and the minimum can be as low as 0°C (31°F). It's advisable to pack layers to comfortably enjoy the varied climate while traveling during this time.

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

The chart illustrates September temperature patterns in Kojonup, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kojonup, September typically has an average temperature of 12°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around 0°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec696966615552505053576168
Data source: Temperature data for Kojonup 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 Kojonup

In Kojonup in September, the precipitation amount is 39 mm (1.5 in), occurring over the course of 6 days.

September Precipitation Trends in Kojonup

The chart displays monthly precipitation patterns in Kojonup, 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 Kojonup, September typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec95530223842575939272410
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kojonup

In Kojonup in September humidity is 71%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, often leaving you feeling clammy and requiring a light jacket to stay warm.

September Average Humidity in Kojonup

This chart illustrates the average monthly humidity levels in Kojonup, 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 Kojonup 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 Kojonup

In Kojonup 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 Kojonup.

Maximum UV Index Levels in Kojonup for September

The chart shows the monthly maximum UV Index (UVI) for Kojonup 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 Kojonup typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412854468101314
Data source: Kojonup 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 Kojonup Compares to Other Months

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

This table compares monthly weather conditions in Kojonup, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (70°F)9 mm (0.4 inches)52%extreme
February Weather20°C (69°F)54 mm (2.1 inches)55%extreme
March Weather19°C (67°F)30 mm (1.2 inches)59%extreme
April Weather16°C (61°F)22 mm (0.8 inches)70%very high
May Weather13°C (55°F)38 mm (1.5 inches)72%moderate
June Weather11°C (52°F)42 mm (1.7 inches)77%moderate
July Weather10°C (50°F)57 mm (2.2 inches)77%moderate
August Weather10°C (50°F)59 mm (2.3 inches)75%high
September Weather12°C (53°F)39 mm (1.5 inches)71%very high
October Weather14°C (57°F)27 mm (1.1 inches)63%very high
November Weather16°C (62°F)24 mm (1.0 inches)56%extreme
December Weather20°C (68°F)10 mm (0.4 inches)53%extreme

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