September Weather in Koah, Australia

Last updated: August 22, 2025

In September, the average temperature in Koah, Australia is a pleasant 20°C (69°F). Expect temperatures to range from a cool 7°C (45°F) to a warm 30°C (87°F). With an average humidity of 72%, it's a comfortable time of year, though you might encounter some rain, with a total precipitation of 8 mm (0.3 in) over just 1 day. Enjoy the variety that this month brings!

September Temperature in Koah

In September in Koah, the average temperature is 20°C (69°F). The maximum can reach 30°C (87°F), while the minimum can be as low as 7°C (45°F). This pleasant climate makes it an ideal time for traveling and exploring the beautiful surroundings.

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

The chart illustrates September temperature patterns in Koah, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koah, September typically has an average temperature of 20°C (69°F), with highs reaching up to 30°C (87°F) and lows dropping to around 7°C (45°F).

Data source: Temperature data for Koah generated using information from the Copernicus Climate Change Service.

September Precipitation in Koah

In Koah in September, the precipitation amount is 8 mm (0.3 in) over the course of 1 day.

September Precipitation Trends in Koah

The chart displays monthly precipitation patterns in Koah, 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 Koah, September typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Koah

In Koah in September humidity is 72%. With an average temperature of 20°C (69°F), this humidity feels like a warm, almost tropical embrace, making it perfect for leisurely strolls but challenging for those unaccustomed to the moist air.

September Average Humidity in Koah

This chart illustrates the average monthly humidity levels in Koah, 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 Koah is approximately 72%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Koah

In Koah in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Koah, you can check here.

Maximum UV Index Levels in Koah for September

The chart shows the monthly maximum UV Index (UVI) for Koah 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 Koah typically reaches 14, which falls under the extreme exposure category.

Data source: Koah 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 Koah Compares to Other Months

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

This table compares monthly weather conditions in Koah, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	323 mm (12.7 inches)	79%	extreme
February Weather	25°C (77°F)	224 mm (8.8 inches)	81%	extreme
March Weather	25°C (76°F)	204 mm (8.0 inches)	83%	extreme
April Weather	23°C (74°F)	119 mm (4.7 inches)	80%	extreme
May Weather	21°C (70°F)	18 mm (0.7 inches)	78%	very high
June Weather	19°C (66°F)	18 mm (0.7 inches)	78%	very high
July Weather	19°C (66°F)	16 mm (0.6 inches)	71%	very high
August Weather	19°C (67°F)	7 mm (0.3 inches)	75%	extreme
September Weather	20°C (69°F)	8 mm (0.3 inches)	72%	extreme
October Weather	23°C (73°F)	27 mm (1.1 inches)	73%	extreme
November Weather	24°C (76°F)	25 mm (1.0 inches)	74%	extreme
December Weather	25°C (78°F)	126 mm (5.0 inches)	75%	extreme