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December Weather in Muara Siau, Indonesia

Last updated: August 23, 2025

In December, the average temperature in Muara Siau, Indonesia hovers around 24°C (76°F), making it a pleasantly warm destination. Expect minimums as cool as 19°C (66°F) and highs reaching up to 31°C (89°F). However, be prepared for the rain, as the region experiences around 355 mm (14.0 in) of precipitation over 27 days, resulting in an average humidity level of 83%.

December Temperature in Muara Siau

In December in Muara Siau, the average temperature is 24°C (76°F). Maximum temperatures can reach 31°C (89°F), while the minimum can drop to as low as 19°C (66°F). This makes Muara Siau an ideal destination for travelers seeking warm and pleasant weather during this time of the year.

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

The chart illustrates December temperature patterns in Muara Siau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Muara Siau, December typically has an average temperature of 24°C (76°F), with highs reaching up to 31°C (89°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec757576767676757575767675
Data source: Temperature data for Muara Siau 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 Muara Siau

In Muara Siau in December, the total precipitation amount is 355 mm (14.0 in) spread over 27 days.

December Precipitation Trends in Muara Siau

The chart displays monthly precipitation patterns in Muara 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 Muara Siau, December typically receives around 355 mm (14.0 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec280337471399245189120137175298359355
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Muara Siau

In Muara Siau in December, humidity is 83%. With an average temperature of 24°C (76°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and possibly causing travelers to sweat more quickly, prompting frequent breaks in shaded areas or the search for refreshing beverages.

December Average Humidity in Muara Siau

This chart illustrates the average monthly humidity levels in Muara 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 Muara Siau is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%79%80%78%78%79%82%84%85%84%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Muara Siau

In Muara Siau 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 Muara Siau.

Maximum UV Index Levels in Muara Siau for December

The chart shows the monthly maximum UV Index (UVI) for Muara 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 Muara Siau typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161412131515151515
Data source: Muara 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 Muara Siau Compares to Other Months

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

This table compares monthly weather conditions in Muara Siau, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)280 mm (11.0 inches)83%extreme
February Weather24°C (75°F)337 mm (13.3 inches)80%extreme
March Weather24°C (76°F)471 mm (18.5 inches)79%extreme
April Weather24°C (76°F)399 mm (15.7 inches)80%extreme
May Weather25°C (77°F)245 mm (9.6 inches)78%extreme
June Weather24°C (76°F)189 mm (7.4 inches)78%extreme
July Weather24°C (75°F)120 mm (4.7 inches)79%extreme
August Weather24°C (75°F)137 mm (5.4 inches)82%extreme
September Weather24°C (76°F)175 mm (6.9 inches)84%extreme
October Weather24°C (76°F)298 mm (11.7 inches)85%extreme
November Weather24°C (76°F)358 mm (14.1 inches)84%extreme
December Weather24°C (76°F)355 mm (14.0 inches)83%extreme

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