September weather forecast
Madang, Papua New Guinea

September maintains the weather script, mirroring similar conditions as August. It inaugurates a series of months marked by longer sunshine durations. The aquatic life displays a vibrant spectrum under the clear waters, attracting snorkelling enthusiasts. The temperature of the sea remains enjoyable at 28.6°C (83.5°F). Subsequently, the corresponding boost in tourism revitalizes the local economy.

Temperature

The initiation of September sees an average high-temperature of a still tropical 30.5°C (86.9°F), showing minor variations from the previous month. Throughout the month of September, Madang reports a steady low-temperature average of 23.6°C (74.5°F).

Heat index

For most parts of September, the heat index is calculated to be a scorching 40°C (104°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Consider that heat index readings are for situations in the shade and light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

In Madang, the average relative humidity in September is 83%.

Rainfall

September is the month with the least rainfall in Madang. Rain falls for 11 days and accumulates 83mm (3.27") of precipitation.

Sea temperature

In Madang, in September, the average water temperature is 28.6°C (83.5°F).
Note: Swimming, diving, and other water endeavors at temperatures between 25°C (77°F) and 29°C (84.2°F) are considered enjoyable and satisfying for extended periods without discomfort.

Daylight

In Madang, the average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 06:16 and sunset at 18:17. On the last day of September, in Madang, sunrise is at 06:02 and sunset at 18:11 +10.

Sunshine

With an average of 7.6h of sunshine, September has the most sunshine of the year in Madang.

UV index

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an extreme health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 12 during September leads to these instructions:
Carry out all vital precautions. Protection from sun exposure is a must. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Directly after swimming or an outdoor workout, generously apply and reapply a broad-spectrum SPF 30+ sunscreen. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.