December Weather in Isak, Indonesia

Last updated: August 23, 2025

In December, the average temperature in Isak, Indonesia hovers around 20°C (68°F), with a minimum of 14°C (58°F) and a maximum of 27°C (80°F). This month sees 348 mm (13.7 in) of precipitation spread across 27 days, contributing to a high average humidity of 86%. Stay prepared for a blend of warmth and moisture during your visit!

December Temperature in Isak

In December in Isak, the average temperature is 20°C (68°F). Maximums can reach 27°C (80°F), while minimums can drop to as low as 14°C (58°F). This temperate climate makes Isak an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates December temperature patterns in Isak, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isak, December typically has an average temperature of 20°C (68°F), with highs reaching up to 27°C (80°F) and lows dropping to around 14°C (58°F).

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

December Precipitation in Isak

In Isak in December, the total precipitation amount is 348 mm (13.7 in) occurring over the span of 27 days.

December Precipitation Trends in Isak

The chart displays monthly precipitation patterns in Isak, 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 Isak, December typically receives around 348 mm (13.7 inches) of precipitation spread over approximately 27 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 Isak

In Isak in December, humidity is 86%. With an average temperature of 20°C (68°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities challenging and necessitating frequent breaks for hydration and shade while traveling.

December Average Humidity in Isak

This chart illustrates the average monthly humidity levels in Isak, 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 Isak is approximately 86%, 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 Isak

In Isak in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Isak.

Maximum UV Index Levels in Isak for December

The chart shows the monthly maximum UV Index (UVI) for Isak 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 Isak typically reaches 13, which falls under the extreme exposure category.

Data source: Isak 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 Isak Compares to Other Months

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

This table compares monthly weather conditions in Isak, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (68°F)	163 mm (6.4 inches)	80%	extreme
February Weather	20°C (68°F)	106 mm (4.2 inches)	73%	extreme
March Weather	20°C (69°F)	157 mm (6.2 inches)	74%	extreme
April Weather	20°C (69°F)	220 mm (8.7 inches)	69%	extreme
May Weather	21°C (69°F)	294 mm (11.6 inches)	75%	extreme
June Weather	20°C (69°F)	127 mm (5.0 inches)	81%	extreme
July Weather	20°C (69°F)	158 mm (6.2 inches)	79%	extreme
August Weather	20°C (68°F)	171 mm (6.7 inches)	84%	extreme
September Weather	20°C (68°F)	224 mm (8.8 inches)	86%	extreme
October Weather	20°C (68°F)	275 mm (10.8 inches)	86%	extreme
November Weather	20°C (67°F)	362 mm (14.3 inches)	86%	extreme
December Weather	20°C (68°F)	348 mm (13.7 inches)	86%	extreme