September Weather in Leinster, Australia

Last updated: August 22, 2025

In Leinster, Australia, the average temperature in September hovers around 19°C (66°F), with minimums dipping to 4°C (40°F) and maximums soaring up to 35°C (95°F). This month sees a scant precipitation of just 2 mm (0.1 in) over the course of 0 days, while the average humidity rests comfortably at 37%. Enjoy the mild weather!

September Temperature in Leinster

In September in Leinster, the average temperature is 19°C (66°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 4°C (40°F). This wide temperature range makes it advisable for travelers to pack clothing suitable for both warm afternoons and cooler evenings.

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

The chart illustrates September temperature patterns in Leinster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leinster, September typically has an average temperature of 19°C (66°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Leinster

In Leinster in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Leinster

The chart displays monthly precipitation patterns in Leinster, 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 Leinster, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 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 Leinster

In Leinster in September humidity is 37%. With an average temperature of 19°C (66°F), this humidity feels pleasantly comfortable for traveling, creating a refreshing atmosphere that makes exploring the area enjoyable without the discomfort of excessive stickiness.

September Average Humidity in Leinster

This chart illustrates the average monthly humidity levels in Leinster, 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 Leinster is approximately 37%, 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 Leinster

In Leinster in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Leinster.

Maximum UV Index Levels in Leinster for September

The chart shows the monthly maximum UV Index (UVI) for Leinster 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 Leinster typically reaches 10, which falls under the very high exposure category.

Data source: Leinster 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 Leinster Compares to Other Months

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

This table compares monthly weather conditions in Leinster, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	30°C (87°F)	21 mm (0.8 inches)	30%	extreme
February Weather	28°C (83°F)	45 mm (1.8 inches)	40%	extreme
March Weather	27°C (81°F)	41 mm (1.6 inches)	49%	extreme
April Weather	23°C (73°F)	13 mm (0.5 inches)	57%	extreme
May Weather	17°C (62°F)	12 mm (0.5 inches)	68%	high
June Weather	13°C (56°F)	11 mm (0.4 inches)	73%	moderate
July Weather	13°C (56°F)	7 mm (0.3 inches)	67%	high
August Weather	15°C (59°F)	12 mm (0.5 inches)	50%	very high
September Weather	19°C (66°F)	2 mm (0.1 inches)	37%	very high
October Weather	23°C (73°F)	9 mm (0.4 inches)	27%	extreme
November Weather	26°C (80°F)	16 mm (0.6 inches)	26%	extreme
December Weather	29°C (85°F)	6 mm (0.2 inches)	27%	extreme