September Weather in Grafton, Australia

Last updated: August 22, 2025

In September, the average temperature in Grafton, Australia is a pleasant 17°C (63°F). Expect a range from a cool 5°C (41°F) to a warm 35°C (96°F). Rainfall is modest, with 24 mm (0.9 in) spread over 6 days, contributing to an average humidity of 69%. Enjoy the diverse weather this month brings!

September Temperature in Grafton

In September in Grafton, the average temperature is 17°C (63°F). Maximums can reach 35°C (96°F) and minimums can drop to as low as 5°C (41°F). This makes it a great time to travel, as you can experience a pleasant mix of warm and cool weather.

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

The chart illustrates September temperature patterns in Grafton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grafton, September typically has an average temperature of 17°C (63°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Grafton

In Grafton in September, the total precipitation amount is 24 mm (0.9 in) over a span of 6 days.

September Precipitation Trends in Grafton

The chart displays monthly precipitation patterns in Grafton, 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 Grafton, September typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 6 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 Grafton

In Grafton in September, humidity is 69%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities feel slightly heavier, yet still comfortable for exploring.

September Average Humidity in Grafton

This chart illustrates the average monthly humidity levels in Grafton, 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 Grafton is approximately 69%, 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 Grafton

In Grafton 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 Grafton.

Maximum UV Index Levels in Grafton for September

The chart shows the monthly maximum UV Index (UVI) for Grafton 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 Grafton typically reaches 9, which falls under the very high exposure category.

Data source: Grafton 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 Grafton Compares to Other Months

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

This table compares monthly weather conditions in Grafton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	79 mm (3.1 inches)	78%	extreme
February Weather	24°C (75°F)	153 mm (6.0 inches)	80%	extreme
March Weather	22°C (72°F)	191 mm (7.5 inches)	80%	extreme
April Weather	19°C (67°F)	47 mm (1.8 inches)	78%	very high
May Weather	16°C (62°F)	35 mm (1.4 inches)	73%	high
June Weather	14°C (57°F)	54 mm (2.1 inches)	71%	moderate
July Weather	13°C (56°F)	33 mm (1.3 inches)	70%	moderate
August Weather	14°C (57°F)	20 mm (0.8 inches)	71%	high
September Weather	17°C (63°F)	24 mm (0.9 inches)	69%	very high
October Weather	19°C (67°F)	112 mm (4.4 inches)	71%	extreme
November Weather	21°C (70°F)	67 mm (2.6 inches)	76%	extreme
December Weather	23°C (74°F)	176 mm (6.9 inches)	80%	extreme