December Weather in Onslow, Australia

Last updated: August 22, 2025

In December, the average temperature in Onslow, Australia reaches a warm 30°C (86°F). Expect a minimum of 19°C (67°F) and an impressive maximum of 47°C (116°F) during this time. Precipitation is minimal, with only 1 mm (0.0 in) recorded over 0 days, and the average humidity hovers around 81%, creating a balmy climate.

December Temperature in Onslow

In December in Onslow, the average temperature is 30°C (86°F). Maximum temperatures can reach 47°C (116°F), while minimums can drop to as low as 19°C (67°F). Be prepared for hot days and cooler nights when traveling during this month.

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

The chart illustrates December temperature patterns in Onslow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onslow, December typically has an average temperature of 30°C (86°F), with highs reaching up to 47°C (116°F) and lows dropping to around 19°C (67°F).

Data source: Temperature data for Onslow generated using information from the Copernicus Climate Change Service.

December Precipitation in Onslow

In Onslow in December, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

December Precipitation Trends in Onslow

The chart displays monthly precipitation patterns in Onslow, 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 Onslow, December typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Onslow

In Onslow in December, humidity is 81%. With an average temperature of 30°C (86°F), this humidity feels like a sweltering blanket wrapping around you, making outdoor activities challenging and requiring frequent breaks in the shade or indoors to stay comfortable while traveling.

December Average Humidity in Onslow

This chart illustrates the average monthly humidity levels in Onslow, 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 Onslow is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Onslow

In Onslow 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 Onslow.

Maximum UV Index Levels in Onslow for December

The chart shows the monthly maximum UV Index (UVI) for Onslow 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 Onslow typically reaches 15, which falls under the extreme exposure category.

Data source: Onslow 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 Onslow Compares to Other Months

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

This table compares monthly weather conditions in Onslow, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	31°C (88°F)	10 mm (0.4 inches)	83%	extreme
February Weather	30°C (87°F)	25 mm (1.0 inches)	82%	extreme
March Weather	31°C (88°F)	37 mm (1.5 inches)	77%	extreme
April Weather	29°C (84°F)	15 mm (0.6 inches)	74%	extreme
May Weather	24°C (76°F)	18 mm (0.7 inches)	68%	very high
June Weather	20°C (69°F)	36 mm (1.4 inches)	64%	high
July Weather	20°C (68°F)	3 mm (0.1 inches)	61%	very high
August Weather	21°C (70°F)	2 mm (0.1 inches)	65%	very high
September Weather	24°C (75°F)	0 mm (0.0 inches)	67%	extreme
October Weather	25°C (78°F)	0 mm (0.0 inches)	74%	extreme
November Weather	27°C (81°F)	2 mm (0.1 inches)	75%	extreme
December Weather	30°C (86°F)	1 mm (0.0 inches)	81%	extreme