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December Weather in Grenfell, Australia

Last updated: August 22, 2025

In Grenfell, Australia, the average temperature in December is a pleasant 23°C (73°F). However, temperatures can vary significantly, with a minimum of 6°C (42°F) and soaring highs of 42°C (108°F). Expect an average precipitation of 57 mm (2.2 in) spread over 6 days, and enjoy a comfortable average humidity of 61%.

December Temperature in Grenfell

In December in Grenfell, the average temperature is 23°C (73°F). Maximum temperatures can reach 42°C (108°F), while minimum temperatures can drop as low as 6°C (42°F). Travelers should be prepared for both hot days and cool nights during this month.

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

The chart illustrates December 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, December typically has an average temperature of 23°C (73°F), with highs reaching up to 42°C (108°F) and lows dropping to around 6°C (42°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.

December Precipitation in Grenfell

In Grenfell in December, the precipitation amount is 57 mm (2.2 in) over a span of 6 days.

December Precipitation Trends in Grenfell

The chart displays monthly precipitation patterns in Grenfell, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Grenfell, December typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec384475274253435139587957
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grenfell

In Grenfell in December humidity is 61%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that can make outdoor activities slightly uncomfortable, as the air clings to your skin and can lead to quicker fatigue during sightseeing adventures.

December Average Humidity in Grenfell

This chart illustrates the average monthly humidity levels in Grenfell, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Grenfell is approximately 61%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Grenfell

In Grenfell in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Grenfell.

Maximum UV Index Levels in Grenfell for December

The chart shows the monthly maximum UV Index (UVI) for Grenfell in December, 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 December, the maximum UV index in Grenfell typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412853468101315
Data source: Grenfell December 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 December 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 December’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 December’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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