September weather forecast
Malang, Indonesia

September, while retaining the city's overall dry and warm climate, denotes a slow return of the rainy season in Malang. The city experiences an uptick in rainfall from the previous month, albeit with a continuing high sunshine output. The increase in precipitation adds freshness to the vibrant landscapes of the city while maintaining a relatively stable temperature. As the city transitions from its driest to wet phase, the month offers a blend of both to its inhabitants. The month confirms that changes are on the horizon, prepping for the upcoming wetter season.

Temperature

September's weather in Malang displays an average high-temperature of a still hot 32.9°C (91.2°F), slightly varied from August's 31.3°C (88.3°F). Throughout September in Malang, a steady low-temperature average of 22.1°C (71.8°F) is noted.

Heat index

For September, the heat index is evaluated at a scorching 42°C (107.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. 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.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 67%.

Rainfall

In Malang, during September, the rain falls for 9 days and regularly aggregates up to 23mm (0.91") of precipitation. In Malang, during the entire year, the rain falls for 223 days and collects up to 1083mm (42.64") of precipitation.

Daylight

In September, the average length of the day is 12h and 4min.
On the first day of September, sunrise is at 05:30 and sunset at 17:28. On the last day of the month, sunrise is at 05:14 and sunset at 17:24 WIB.

Sunshine

August through October, with an average of 9.5h of sunshine, are months with the most sunshine in Malang.

UV index

The months with the highest UV index in Malang are April, June through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 7 during September leads to these instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.