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December Weather in Boyanup, Australia

Last updated: August 22, 2025

In Boyanup, Australia, the average temperature in December is a comfortable 20°C (69°F), with a minimum dipping to 8°C (47°F) and a maximum soaring to 38°C (100°F). Expect 15 mm (0.6 in) of precipitation over about 2 days. The weather is typically accompanied by an average humidity of 53%, making it an ideal time for outdoor activities while enjoying the pleasant climate!

December Temperature in Boyanup

In December in Boyanup, the average temperature is 20°C (69°F). Maximum temperatures can reach 38°C (100°F), while minimums can dip as low as 8°C (47°F). This makes it a great time for travelers to enjoy both warm days and cooler evenings.

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

The chart illustrates December temperature patterns in Boyanup, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boyanup, December typically has an average temperature of 20°C (69°F), with highs reaching up to 38°C (100°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec717169635856545456596369
Data source: Temperature data for Boyanup 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 Boyanup

In Boyanup in December, the precipitation amount is 15 mm (0.6 in) over the course of 2 days.

December Precipitation Trends in Boyanup

The chart displays monthly precipitation patterns in Boyanup, 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 Boyanup, December typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec83432337310512910762492815
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Boyanup

In Boyanup in December humidity is 53%. With an average temperature of 20°C (69°F), this humidity feels like a gentle embrace, making it comfortable for traveling as long as you stay hydrated and take breaks in the shade.

December Average Humidity in Boyanup

This chart illustrates the average monthly humidity levels in Boyanup, 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 Boyanup is approximately 53%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Boyanup

In Boyanup in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Boyanup, you can check here.

Maximum UV Index Levels in Boyanup for December

The chart shows the monthly maximum UV Index (UVI) for Boyanup 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 Boyanup typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141411854458101214
Data source: Boyanup 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 Boyanup Compares to Other Months

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

This table compares monthly weather conditions in Boyanup, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (71°F)8 mm (0.3 inches)52%extreme
February Weather21°C (71°F)34 mm (1.3 inches)55%extreme
March Weather20°C (69°F)32 mm (1.3 inches)59%extreme
April Weather17°C (64°F)33 mm (1.3 inches)70%very high
May Weather14°C (58°F)73 mm (2.9 inches)72%moderate
June Weather13°C (56°F)105 mm (4.1 inches)77%moderate
July Weather12°C (55°F)129 mm (5.1 inches)77%moderate
August Weather12°C (54°F)107 mm (4.2 inches)75%moderate
September Weather13°C (56°F)62 mm (2.4 inches)71%very high
October Weather15°C (59°F)49 mm (1.9 inches)63%very high
November Weather17°C (63°F)28 mm (1.1 inches)56%extreme
December Weather20°C (69°F)15 mm (0.6 inches)53%extreme

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