September weather forecast
Merauke, Indonesia

With September, a substantial increase in rainfall in Merauke, Indonesia signals the end of the dry spell. While the weather remains consistent with August in terms of relative humidity and temperatures, ongoing changes indicate the transition into the wet season. October weather forecasts point towards higher precipitation levels and a corresponding decrease in sunlight hours. Importantly, the pressure continues to remain steady, reflecting the climate's consistency. Although rainfall begins to mount, the tropical climate retains its appeal, with warm sea temperatures and generous daylight hours.

Temperature

September's advent presents an average high-temperature of a still warm 29.9°C (85.8°F), indicating a slight variation from the conditions of the previous month. In Merauke, September nights witness a steady temperature drop to a still warm 23.7°C (74.7°F).

Heat index

The average heat index in September is appraised at a very hot 36°C (96.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

September through November, with an average relative humidity of 75%, are the least humid months in Merauke.

Rainfall

In Merauke, during September, the rain falls for 9 days and regularly aggregates up to 29mm (1.14") of precipitation. Throughout the year, in Merauke, there are 213.7 rainfall days, and 1054mm (41.5") of precipitation is accumulated.

Sea temperature

July through September, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater in Merauke.
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

In Merauke, Indonesia, the average length of the day in September is 12h and 4min.
On the first day of the month, sunrise is at 05:39 and sunset at 17:36. On the last day of September, in Merauke, sunrise is at 05:23 and sunset at 17:33 WIT.

Sunshine

In September, the average sunshine is 7.2h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Merauke. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.