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December Weather in Grafton, Australia

Last updated: August 22, 2025

In December, the average temperature in Grafton, Australia reaches a comfortable 23°C (74°F). However, be prepared for a range, as temperatures can dip to a chilly 13°C (56°F) or soar to a sweltering 37°C (98°F). With an average precipitation of 176 mm (6.9 in) over 14 days, you can expect some rain, and the atmosphere is quite humid, with an average humidity of 80%.

December Temperature in Grafton

In December in Grafton, the average temperature is 23°C (74°F). Maximum temperatures can reach 37°C (98°F), while minimums can drop as low as 13°C (56°F). This makes Grafton an ideal destination for travelers seeking warm and pleasant weather during this time of year.

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

The chart illustrates December temperature patterns in Grafton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grafton, December typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec767472666157555762677074
Data source: Temperature data for Grafton 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 Grafton

In Grafton in December, the precipitation amount is 176 mm (6.9 in) over a period of 14 days.

December Precipitation Trends in Grafton

The chart displays monthly precipitation patterns in Grafton, 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 Grafton, December typically receives around 176 mm (6.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7915319147355433202411267176
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grafton

In Grafton in December humidity is 80%. With an average temperature of 23°C (74°F), this humidity feels like walking through a warm, damp blanket, making travel feel sticky and muggy, where every step leaves you yearning for a cool breeze.

December Average Humidity in Grafton

This chart illustrates the average monthly humidity levels in Grafton, 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 Grafton is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%80%78%74%71%70%71%69%71%76%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grafton

In Grafton 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 Grafton.

Maximum UV Index Levels in Grafton for December

The chart shows the monthly maximum UV Index (UVI) for Grafton 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 Grafton typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151513974579111315
Data source: Grafton 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 Grafton Compares to Other Months

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

This table compares monthly weather conditions in Grafton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)79 mm (3.1 inches)78%extreme
February Weather24°C (75°F)153 mm (6.0 inches)80%extreme
March Weather22°C (72°F)191 mm (7.5 inches)80%extreme
April Weather19°C (67°F)47 mm (1.8 inches)78%very high
May Weather16°C (62°F)35 mm (1.4 inches)73%high
June Weather14°C (57°F)54 mm (2.1 inches)71%moderate
July Weather13°C (56°F)33 mm (1.3 inches)70%moderate
August Weather14°C (57°F)20 mm (0.8 inches)71%high
September Weather17°C (63°F)24 mm (0.9 inches)69%very high
October Weather19°C (67°F)112 mm (4.4 inches)71%extreme
November Weather21°C (70°F)67 mm (2.6 inches)76%extreme
December Weather23°C (74°F)176 mm (6.9 inches)80%extreme

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