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September Weather in Grenfell, Australia

Last updated: August 22, 2025

In September, the average temperature in Grenfell, Australia hovers around 12°C (53°F), with extremes ranging from a chilly -3°C (27°F) to a warm 31°C (87°F). Expect a precipitation total of 39 mm (1.6 in) spread over approximately 5 days, alongside an average humidity of 70%. Perfect for those who enjoy a mix of cool and warm days!

September Temperature in Grenfell

In September in Grenfell, the average temperature is 12°C (53°F), with maximums reaching up to 31°C (87°F) and minimums dropping as low as -3°C (27°F). This wide range of temperatures makes it essential for travelers to pack accordingly and prepare for varying weather conditions.

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

The chart illustrates September temperature patterns in Grenfell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grenfell, September typically has an average temperature of 12°C (53°F), with highs reaching up to 31°C (87°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec787369615246464653616673
Data source: Temperature data for Grenfell 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 Grenfell

In Grenfell in September, the precipitation amount is 39 mm (1.6 in) over a period of 5 days.

September Precipitation Trends in Grenfell

The chart displays monthly precipitation patterns in Grenfell, 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 Grenfell, September typically receives around 39 mm (1.6 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec384475274253435139587957
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grenfell

In Grenfell in September humidity is 70%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill wrapping around you, making outdoor activities less enjoyable and prompting the need for warm clothing to stay comfortable while traveling.

September Average Humidity in Grenfell

This chart illustrates the average monthly humidity levels in Grenfell, 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 Grenfell is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec58%65%68%74%78%80%81%77%70%58%57%61%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grenfell

In Grenfell 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 Grenfell.

Maximum UV Index Levels in Grenfell for September

The chart shows the monthly maximum UV Index (UVI) for Grenfell 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 Grenfell typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412853468101315
Data source: Grenfell 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 Grenfell Compares to Other Months

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

This table compares monthly weather conditions in Grenfell, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)38 mm (1.5 inches)58%extreme
February Weather23°C (74°F)44 mm (1.7 inches)65%extreme
March Weather21°C (69°F)75 mm (2.9 inches)68%extreme
April Weather16°C (61°F)27 mm (1.1 inches)74%very high
May Weather11°C (52°F)42 mm (1.7 inches)78%moderate
June Weather8°C (47°F)53 mm (2.1 inches)79%moderate
July Weather8°C (46°F)43 mm (1.7 inches)80%moderate
August Weather8°C (47°F)51 mm (2.0 inches)77%high
September Weather12°C (53°F)39 mm (1.6 inches)70%very high
October Weather16°C (61°F)58 mm (2.3 inches)58%very high
November Weather19°C (66°F)79 mm (3.1 inches)57%extreme
December Weather23°C (73°F)57 mm (2.2 inches)61%extreme

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