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September Weather in Killara, Australia

Last updated: August 22, 2025

In Killara, Australia, the average temperature in September hovers around 10°C (50°F), showcasing a mild climate. However, be prepared for fluctuations, as temperatures can dip to a chilly -2°C (29°F) or rise to a warm 27°C (80°F). Rainfall is not uncommon, with 65 mm (2.6 in) of precipitation expected over approximately 8 days. On top of that, the average humidity sits at a comfortable 73%, creating a pleasant atmosphere throughout the month.

September Temperature in Killara

In September in Killara, the average temperature is 10°C (50°F), with maximums reaching 27°C (80°F) and minimums dipping as low as -2°C (29°F). It’s advisable to pack layers to accommodate the varied temperatures while exploring this destination.

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

The chart illustrates September temperature patterns in Killara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Killara, September typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (80°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec747066585044444550576369
Data source: Temperature data for Killara 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 Killara

In Killara in September, the total precipitation amount is 65 mm (2.6 in) spread over the course of 8 days.

September Precipitation Trends in Killara

The chart displays monthly precipitation patterns in Killara, 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 Killara, September typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec443662618374859065858573
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Killara

In Killara in September, humidity is 73%. With an average temperature of 10°C (50°F), this humidity feels like a chilly, damp embrace, making it essential to layer your clothing while traveling, as the moisture in the air can quickly chill you to the bone.

September Average Humidity in Killara

This chart illustrates the average monthly humidity levels in Killara, 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 Killara is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec45%52%61%72%79%82%84%80%73%60%58%51%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Killara

In Killara 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 Killara.

Maximum UV Index Levels in Killara for September

The chart shows the monthly maximum UV Index (UVI) for Killara 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 Killara typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14121175335891214
Data source: Killara 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 Killara Compares to Other Months

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

This table compares monthly weather conditions in Killara, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (75°F)44 mm (1.7 inches)45%extreme
February Weather21°C (71°F)36 mm (1.4 inches)52%extreme
March Weather19°C (67°F)62 mm (2.4 inches)61%extreme
April Weather15°C (58°F)61 mm (2.4 inches)72%high
May Weather10°C (50°F)83 mm (3.3 inches)79%moderate
June Weather7°C (44°F)73 mm (2.9 inches)82%moderate
July Weather7°C (44°F)85 mm (3.3 inches)84%moderate
August Weather7°C (45°F)90 mm (3.5 inches)80%moderate
September Weather10°C (50°F)65 mm (2.6 inches)73%very high
October Weather14°C (57°F)85 mm (3.4 inches)60%very high
November Weather17°C (63°F)85 mm (3.3 inches)58%extreme
December Weather21°C (69°F)73 mm (2.9 inches)51%extreme

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