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December Weather in Sili, Samoa

Last updated: August 31, 2025

In December, the average temperature in Sili, Samoa hovers around 25°C (77°F). Expect a minimum of 22°C (73°F) and a pleasant maximum of 28°C (82°F). However, be prepared for significant rainfall, with an average precipitation of 458 mm (18.0 in) spread over 29 days, complemented by an average humidity of 79%.

December Temperature in Sili

In December in Sili, the average temperature is a comfortable 25°C (77°F), with maximums reaching up to 28°C (82°F) and minimums dropping to as low as 22°C (73°F). It's an ideal time for travelers to enjoy outdoor activities while experiencing pleasant weather.

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

The chart illustrates December temperature patterns in Sili, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sili, December typically has an average temperature of 25°C (77°F), with highs reaching up to 28°C (82°F) and lows dropping to around 22°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec787778787777767676767777
Data source: Temperature data for Sili 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 Sili

In Sili in December, the total precipitation amount is 458 mm (18.0 in) spread out over 29 days.

December Precipitation Trends in Sili

The chart displays monthly precipitation patterns in Sili, 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 Sili, December typically receives around 458 mm (18.0 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec350586202247193129194129124205265458
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sili

In Sili in December, humidity is 79%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sluggish but pleasantly tropical.

December Average Humidity in Sili

This chart illustrates the average monthly humidity levels in Sili, 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 Sili is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%78%78%79%80%82%84%84%82%80%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sili

In Sili 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 Sili.

Maximum UV Index Levels in Sili for December

The chart shows the monthly maximum UV Index (UVI) for Sili 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 Sili typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16161613119101214151515
Data source: Sili 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 Sili Compares to Other Months

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

This table compares monthly weather conditions in Sili, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)350 mm (13.8 inches)78%extreme
February Weather25°C (78°F)585 mm (23.1 inches)78%extreme
March Weather25°C (78°F)202 mm (7.9 inches)78%extreme
April Weather25°C (78°F)247 mm (9.7 inches)78%extreme
May Weather25°C (78°F)193 mm (7.6 inches)79%extreme
June Weather25°C (77°F)129 mm (5.1 inches)80%very high
July Weather24°C (76°F)194 mm (7.6 inches)82%very high
August Weather24°C (76°F)129 mm (5.1 inches)84%extreme
September Weather24°C (76°F)124 mm (4.9 inches)84%extreme
October Weather25°C (76°F)205 mm (8.1 inches)82%extreme
November Weather25°C (77°F)265 mm (10.4 inches)80%extreme
December Weather25°C (77°F)458 mm (18.0 inches)79%extreme

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