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 start of September in Madang marks an average high-temperature of a still tropical 30.5°C (86.9°F), hardly distinguishable from the conditions in August. September in Madang generally records an average low-temperature of 23.6°C (74.5°F).

Heat index

In September, the heat index is evaluated at a blistering 40°C (104°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The average relative humidity in September in Madang is 83%.

Rainfall

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

Sea temperature

In September, the average sea temperature is 28.6°C (83.5°F).
Note: Water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are pleasurable, without feeling uncomfortable even during extended periods.

Daylight

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

Sunshine

September has the most sunshine of the year, with an average of 7.6h of sunshine.

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 ultimate health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 12 during September leads to these instructions:
Carry out every crucial safety measure. People with fair skin may sustain burns in fewer than 5 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat. Sunscreen of at least SPF 30 should be applied generously and reapplied often on overcast days, especially post swim or outdoor exercise. Take note! The UV strength of the Sun elevates when reflected off water and sand.