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December Weather in Williams, Australia

Last updated: August 22, 2025

In Williams, Australia, the average temperature in December is a delightful 21°C (71°F). However, temperatures can vary widely, ranging from a chilly 5°C (41°F) to a scorching 40°C (105°F). Expect minimal precipitation, with an average of just 5 mm (0.2 in) over a couple of days. The humidity remains comfortable at around 53%, making it a pleasant time to experience all that this destination has to offer!

December Temperature in Williams

In December in Williams, the average temperature is 21°C (71°F), with maximums reaching 40°C (105°F) and minimums dropping as low as 5°C (41°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack accordingly for both warm and cooler days.

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

The chart illustrates December temperature patterns in Williams, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williams, December typically has an average temperature of 21°C (71°F), with highs reaching up to 40°C (105°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec727168625552515054586470
Data source: Temperature data for Williams 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 Williams

In Williams in December, the precipitation amount is 5 mm (0.2 in) over a period of 2 days.

December Precipitation Trends in Williams

The chart displays monthly precipitation patterns in Williams, 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 Williams, December typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec15543320405769613526195
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Williams

In Williams in December humidity is 53%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making it comfortable for traveling as you can enjoy the sights without feeling overly sticky or tired.

December Average Humidity in Williams

This chart illustrates the average monthly humidity levels in Williams, 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 Williams 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 Williams

In Williams 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 Williams, you can check here.

Maximum UV Index Levels in Williams for December

The chart shows the monthly maximum UV Index (UVI) for Williams 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 Williams typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412964468111314
Data source: Williams 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 Williams Compares to Other Months

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

This table compares monthly weather conditions in Williams, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)15 mm (0.6 inches)52%extreme
February Weather22°C (71°F)54 mm (2.1 inches)55%extreme
March Weather20°C (68°F)33 mm (1.3 inches)59%extreme
April Weather17°C (62°F)20 mm (0.8 inches)70%very high
May Weather13°C (56°F)40 mm (1.6 inches)72%high
June Weather11°C (52°F)57 mm (2.3 inches)77%moderate
July Weather10°C (51°F)69 mm (2.7 inches)77%moderate
August Weather10°C (51°F)61 mm (2.4 inches)75%high
September Weather12°C (54°F)35 mm (1.4 inches)71%very high
October Weather15°C (58°F)26 mm (1.0 inches)63%extreme
November Weather18°C (64°F)19 mm (0.8 inches)56%extreme
December Weather21°C (71°F)5 mm (0.2 inches)53%extreme

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