January Weather in Mersak, Indonesia

Last updated: August 23, 2025

In Mersak, Indonesia, the average temperature in January is a pleasant 18°C (66°F), with a minimum dipping to 13°C (55°F) and a maximum soaring to 26°C (80°F). Expect 318 mm (12.5 in) of precipitation spread across 24 days, contributing to an average humidity of 79%. Stay prepared for a mix of mild, humid days with refreshing showers!

January Temperature in Mersak

In January in Mersak, the average temperature is 18°C (66°F). Maximums can reach 26°C (80°F), and minimums can be as low as 13°C (55°F). This mild climate makes it an ideal time for outdoor activities and exploration.

January Weather in Mersak: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Mersak, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mersak, January typically has an average temperature of 18°C (66°F), with highs reaching up to 26°C (80°F) and lows dropping to around 13°C (55°F).

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

January Precipitation in Mersak

In Mersak in January, the total precipitation amount is 318 mm (12.5 in) over a span of 24 days.

January Precipitation Trends in Mersak

The chart displays monthly precipitation patterns in Mersak, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Mersak, January typically receives around 318 mm (12.5 inches) of precipitation spread over approximately 24 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Mersak

In Mersak in January, humidity is 79%. With an average temperature of 18°C (66°F), this humidity feels like a warm, enveloping blanket, making outdoor activities slightly uncomfortable and sticky, but also offering a vibrant atmosphere perfect for exploring local cafes and shaded parks.

January Average Humidity in Mersak

This chart illustrates the average monthly humidity levels in Mersak, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Mersak is approximately 79%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Mersak

In Mersak in January, 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 Mersak.

Maximum UV Index Levels in Mersak for January

The chart shows the monthly maximum UV Index (UVI) for Mersak in January, 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 January, the maximum UV index in Mersak typically reaches 15, which falls under the extreme exposure category.

Data source: Mersak January 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 January Weather in Mersak Compares to Other Months

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

This table compares monthly weather conditions in Mersak, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (66°F)	318 mm (12.5 inches)	79%	extreme
February Weather	19°C (66°F)	292 mm (11.5 inches)	73%	extreme
March Weather	19°C (66°F)	445 mm (17.5 inches)	74%	extreme
April Weather	19°C (66°F)	557 mm (21.9 inches)	73%	extreme
May Weather	19°C (67°F)	502 mm (19.8 inches)	77%	extreme
June Weather	19°C (66°F)	297 mm (11.7 inches)	79%	extreme
July Weather	19°C (66°F)	296 mm (11.7 inches)	77%	extreme
August Weather	19°C (66°F)	327 mm (12.9 inches)	81%	extreme
September Weather	18°C (65°F)	456 mm (18.0 inches)	84%	extreme
October Weather	18°C (65°F)	463 mm (18.2 inches)	85%	extreme
November Weather	18°C (65°F)	569 mm (22.4 inches)	83%	extreme
December Weather	19°C (66°F)	559 mm (22.0 inches)	81%	extreme