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September Weather in Collie, Australia

Last updated: August 22, 2025

In September, the average temperature in Collie, Australia hovers around 12°C (54°F), with values ranging from a chilly 1°C (34°F) to a warm 29°C (84°F). Expect about 64 mm (2.5 in) of precipitation spread over 9 days, and enjoy an average humidity of 71%, creating a comfortable yet refreshing atmosphere.

September Temperature in Collie

In September in Collie, the average temperature is 12°C (54°F). Maximums can reach 29°C (84°F) and minimums can be as low as 1°C (34°F). This variability in temperature makes it essential for travelers to pack layers to stay comfortable while exploring.

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

The chart illustrates September temperature patterns in Collie, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Collie, September typically has an average temperature of 12°C (54°F), with highs reaching up to 29°C (84°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec717068625653525154576369
Data source: Temperature data for Collie 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 Collie

In Collie in September, the precipitation amount is 64 mm (2.5 in) over a span of 9 days.

September Precipitation Trends in Collie

The chart displays monthly precipitation patterns in Collie, 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 Collie, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec13532929659312510364432813
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Collie

In Collie in September humidity is 71%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring the area, as the cool air can be refreshing yet slightly uncomfortable without proper attire for outdoor activities.

September Average Humidity in Collie

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

In Collie 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 Collie.

Maximum UV Index Levels in Collie for September

The chart shows the monthly maximum UV Index (UVI) for Collie 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 Collie typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141412854468101314
Data source: Collie 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 Collie Compares to Other Months

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

This table compares monthly weather conditions in Collie, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (71°F)13 mm (0.5 inches)52%extreme
February Weather21°C (71°F)53 mm (2.1 inches)55%extreme
March Weather20°C (68°F)29 mm (1.2 inches)59%extreme
April Weather17°C (62°F)29 mm (1.1 inches)70%very high
May Weather13°C (56°F)65 mm (2.5 inches)72%moderate
June Weather11°C (53°F)93 mm (3.7 inches)77%moderate
July Weather11°C (52°F)125 mm (4.9 inches)77%moderate
August Weather11°C (52°F)103 mm (4.1 inches)75%high
September Weather12°C (54°F)64 mm (2.5 inches)71%very high
October Weather14°C (58°F)43 mm (1.7 inches)63%very high
November Weather17°C (63°F)28 mm (1.1 inches)56%extreme
December Weather21°C (69°F)13 mm (0.5 inches)53%extreme

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