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December Weather in Jamestown, Australia

Last updated: August 22, 2025

In Jamestown, Australia, the average temperature in December hovers around 21°C (71°F), providing a comfortable backdrop for various activities. However, temperatures can fluctuate, with a minimum of 7°C (44°F) and a scorching maximum of 43°C (110°F). Expect moderate weather during this time, as precipitation amounts to 22 mm (0.9 in) spread across about 4 days, while the average humidity stands at a refreshing 37%.

December Temperature in Jamestown

In December in Jamestown, the average temperature is 21°C (71°F). Maximum temperatures can reach 43°C (110°F) and minimums can drop as low as 7°C (44°F). Travelers should be prepared for a wide range of temperatures and plan their activities accordingly.

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

The chart illustrates December temperature patterns in Jamestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jamestown, December typically has an average temperature of 21°C (71°F), with highs reaching up to 43°C (110°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec747169625348484854606570
Data source: Temperature data for Jamestown 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 Jamestown

In Jamestown in December, the precipitation amount is 22 mm (0.9 in) over a duration of 4 days.

December Precipitation Trends in Jamestown

The chart displays monthly precipitation patterns in Jamestown, 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 Jamestown, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec14228263134345129343922
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Jamestown

In Jamestown in December, humidity is 37%. With an average temperature of 21°C (71°F), this humidity feels like a comfortable embrace, making it an ideal environment for exploring and enjoying outdoor activities without the discomfort of excessive stickiness.

December Average Humidity in Jamestown

This chart illustrates the average monthly humidity levels in Jamestown, 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 Jamestown is approximately 37%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec30%35%50%60%69%71%72%64%57%40%40%37%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jamestown

In Jamestown in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Jamestown.

Maximum UV Index Levels in Jamestown for December

The chart shows the monthly maximum UV Index (UVI) for Jamestown 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 Jamestown typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412964468111316
Data source: Jamestown 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 Jamestown Compares to Other Months

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

This table compares monthly weather conditions in Jamestown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)14 mm (0.5 inches)30%extreme
February Weather22°C (71°F)22 mm (0.9 inches)35%extreme
March Weather20°C (69°F)8 mm (0.3 inches)50%extreme
April Weather17°C (62°F)26 mm (1.0 inches)60%very high
May Weather12°C (53°F)31 mm (1.2 inches)69%high
June Weather9°C (48°F)34 mm (1.3 inches)71%moderate
July Weather9°C (49°F)34 mm (1.3 inches)72%moderate
August Weather9°C (49°F)51 mm (2.0 inches)64%high
September Weather12°C (55°F)29 mm (1.2 inches)57%very high
October Weather16°C (60°F)34 mm (1.3 inches)40%extreme
November Weather18°C (65°F)39 mm (1.5 inches)40%extreme
December Weather21°C (71°F)22 mm (0.9 inches)37%extreme

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