September weather forecastMedan, Indonesia

Weather in September

Weather conditions in September bear similarities to the preceding months, with warm temperatures and almost predictable rains. Enhancing the month's characteristic tropical ambiance, a slight decrease in temperature is noted. The bright sunlight effectively warms the day, promising clear skies and providing good visibility. Expect the occasional rain shower as is typical for Medan's climate, but the weather remains mostly warm. Enduring the stable tropical climate, September manages to maintain an agreeable warmth despite frequent rain showers.

Temperature

The beginning of September reveals an average high-temperature of a still hot 32.6°C (90.7°F), showing minimal deviation from the previous month. The average low-temperature during September nights is a warm 23.4°C (74.1°F).

Heat index

In September, the average heat index is computed to be a life-threatening hot 45°C (113°F). Stay vigilant: Heat cramps along with heat exhaustion are expected. Heatstroke may follow prolonged exertion.
In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Medan, in September, during 26.7 rainfall days, 105mm (4.13") of precipitation is typically accumulated. In Medan, during the entire year, the rain falls for 298 days and collects up to 1172mm (46.14") of precipitation.

Daylight

In Medan, Indonesia, the average length of the day in September is 12h and 8min.
On the first day of September in Medan, sunrise is at 06:19 and sunset at 18:30. On the last day of the month, sunrise is at 06:12 and sunset at 18:17 WIB.

Sunshine

The average sunshine in September is 8.8h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Deter overexposure. Protecting against the sun's effects is essential. 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. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.