December Weather in Ondong Siau, Indonesia

Last updated: August 23, 2025

In December, the average temperature in Ondong Siau, Indonesia is a pleasant 27°C (81°F), with minimums dipping to 25°C (78°F) and maximums reaching up to 29°C (85°F). Expect some rainfall, with an average precipitation of 272 mm (10.7 in) spread across 28 days. Humidity levels are high, averaging around 75%, so be prepared for a warm, humid month!

December Temperature in Ondong Siau

In December in Ondong Siau, the average temperature is 27°C (81°F), with maximums reaching up to 29°C (85°F) and minimums dipping as low as 25°C (78°F). This pleasant weather makes it an ideal destination for travelers looking to enjoy a warm climate.

December Weather in Ondong Siau: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Ondong Siau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ondong Siau, December typically has an average temperature of 27°C (81°F), with highs reaching up to 29°C (85°F) and lows dropping to around 25°C (78°F).

Data source: Temperature data for Ondong Siau generated using information from the Copernicus Climate Change Service.

December Precipitation in Ondong Siau

In Ondong Siau in December, the precipitation amount is 272 mm (10.7 in) falling over the course of 28 days.

December Precipitation Trends in Ondong Siau

The chart displays monthly precipitation patterns in Ondong Siau, 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 Ondong Siau, December typically receives around 272 mm (10.7 inches) of precipitation spread over approximately 28 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Ondong Siau

In Ondong Siau in December, humidity is 75%. With an average temperature of 27°C (81°F), this humidity feels like a blanket of warmth enveloping you, making outdoor activities sticky and potentially uncomfortable for traveling.

December Average Humidity in Ondong Siau

This chart illustrates the average monthly humidity levels in Ondong Siau, 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 Ondong Siau is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Ondong Siau

In Ondong Siau in December, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Ondong Siau.

Maximum UV Index Levels in Ondong Siau for December

The chart shows the monthly maximum UV Index (UVI) for Ondong Siau 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 Ondong Siau typically reaches 12, which falls under the extreme exposure category.

Data source: Ondong Siau 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 Ondong Siau Compares to Other Months

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

This table compares monthly weather conditions in Ondong Siau, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	297 mm (11.7 inches)	78%	extreme
February Weather	27°C (81°F)	172 mm (6.8 inches)	83%	extreme
March Weather	27°C (81°F)	252 mm (9.9 inches)	82%	extreme
April Weather	27°C (82°F)	147 mm (5.8 inches)	80%	extreme
May Weather	28°C (82°F)	212 mm (8.3 inches)	74%	extreme
June Weather	27°C (82°F)	289 mm (11.4 inches)	74%	extreme
July Weather	27°C (82°F)	252 mm (9.9 inches)	75%	extreme
August Weather	28°C (82°F)	182 mm (7.2 inches)	76%	extreme
September Weather	27°C (82°F)	170 mm (6.7 inches)	77%	extreme
October Weather	28°C (82°F)	163 mm (6.4 inches)	75%	extreme
November Weather	27°C (82°F)	259 mm (10.2 inches)	74%	extreme
December Weather	27°C (81°F)	272 mm (10.7 inches)	75%	extreme