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December Weather in Merredin, Australia

Last updated: August 22, 2025

In December, the average temperature in Merredin, Australia is a pleasant 25°C (77°F). However, be prepared for a temperature range that can swing from a chilly 6°C (44°F) to a sweltering 43°C (109°F). This month sees a minimal precipitation of just 7 mm (0.3 in) over 1 day, and you can expect the average humidity to be around 29%. Stay comfortable and enjoy your time!

December Temperature in Merredin

In December in Merredin, the average temperature is 25°C (77°F). Maximums can reach 43°C (109°F) and minimums can be as low as 6°C (44°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates December temperature patterns in Merredin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merredin, December typically has an average temperature of 25°C (77°F), with highs reaching up to 43°C (109°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec797774675854525257647077
Data source: Temperature data for Merredin 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 Merredin

In Merredin in December, the precipitation amount is 7 mm (0.3 in) over the course of 1 day.

December Precipitation Trends in Merredin

The chart displays monthly precipitation patterns in Merredin, 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 Merredin, December typically receives around 7 mm (0.3 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec14342217273344361218147
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Merredin

In Merredin in December, humidity is 29%. With an average temperature of 25°C (77°F), this humidity feels like a pleasant, refreshing breeze, making it ideal for exploring the outdoors and enjoying leisurely strolls without feeling overwhelmed by the heat.

December Average Humidity in Merredin

This chart illustrates the average monthly humidity levels in Merredin, 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 Merredin is approximately 29%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec32%40%46%61%68%75%72%66%53%37%32%29%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Merredin

In Merredin 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 Merredin.

Maximum UV Index Levels in Merredin for December

The chart shows the monthly maximum UV Index (UVI) for Merredin 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 Merredin typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151513964569111415
Data source: Merredin 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 Merredin Compares to Other Months

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

This table compares monthly weather conditions in Merredin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)14 mm (0.6 inches)32%extreme
February Weather25°C (77°F)34 mm (1.3 inches)40%extreme
March Weather23°C (74°F)22 mm (0.9 inches)46%extreme
April Weather19°C (67°F)17 mm (0.7 inches)61%very high
May Weather14°C (58°F)27 mm (1.1 inches)68%high
June Weather12°C (54°F)33 mm (1.3 inches)75%moderate
July Weather11°C (53°F)44 mm (1.7 inches)72%moderate
August Weather11°C (53°F)36 mm (1.4 inches)66%high
September Weather14°C (58°F)12 mm (0.5 inches)53%very high
October Weather18°C (64°F)18 mm (0.7 inches)37%extreme
November Weather21°C (70°F)14 mm (0.6 inches)32%extreme
December Weather25°C (77°F)7 mm (0.3 inches)29%extreme

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