September weather forecast
Medan, Indonesia

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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.
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Frequently asked questions

How hot is it in Medan in September?

In Medan, in September, the average high-temperature is 32.6°C (90.7°F), and the average low-temperature is 23.4°C (74.1°F). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, is computed to be 45°C (113°F).

What is the average humidity in September in Medan?

The average relative humidity in September in Medan, Indonesia, is 77%.

How many days does it rain in September in Medan?

In Medan, in September, during 26.7 rainfall days, 105mm (4.13") of precipitation is typically accumulated.

What is the average length of the day in September in Medan?

In Medan, Indonesia, the average day length in September is 12h and 8min.

What time are sunrise and sunset in September in Medan?

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.

How many hours of sunshine does Medan have in September?

In Medan, Indonesia, the average sunshine duration in September is 8.8h.

What is the month with the highest UV index in Medan?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Medan, Indonesia.

What is the month with the lowest UV index in Medan?

January through December, with an average maximum UV index of 7, are months with the lowest UV index in Medan.

How high is the UV index in September in Medan?

In September, the average daily maximum UV index in Medan, Indonesia, is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Medan, Indonesia

Average temperature in September - Medan, Indonesia
  • Average high temperature in September: 32.6°C

The warmest month (with the highest average high temperature) is June (33.5°C).
The months with the lowest average high temperature are January and December (30.8°C).

  • Average low temperature in September: 23.4°C

The month with the highest average low temperature is May (24.3°C).
The coldest month (with the lowest average low temperature) is January (23°C).

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Average pressure in September
Medan, Indonesia

Average pressure in September - Medan, Indonesia
  • Average pressure in September: 1010.6mbar

The month with the highest atmospheric pressure is January (1010.9mbar).
The month with the lowest atmospheric pressure is May (1009.6mbar).

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Average wind speed in September
Medan, Indonesia

Average wind speed in September - Medan, Indonesia
  • Average wind speed in September: 4.8km/h

The windiest month (with the highest average wind speed) is February (5.6km/h).
The calmest months (with the lowest average wind speed) are September and October (4.8km/h).

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Average humidity in September
Medan, Indonesia

Average humidity in September - Medan, Indonesia
  • Average humidity in September: 77%

The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are March and June (75%).

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Average rainfall in September
Medan, Indonesia

Average rainfall in September - Medan, Indonesia
  • Average rainfall in September: 105mm

The wettest month (with the highest rainfall) is October (154mm).
The driest month (with the least rainfall) is February (60mm).

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Average rainfall days in September
Medan, Indonesia

Average rainfall days in September - Medan, Indonesia
  • Average rainfall days in September: 26.7 days

The month with the highest number of rainy days is October (28.3 days).
The month with the least rainy days is February (18.8 days).

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Average daylight in September /
Average sunshine in September
Medan, Indonesia

Average daylight in September / Average sunshine in September - Medan, Indonesia
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 8h and 0min).

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Average sunshine days in September
Medan, Indonesia

Average sunshine days in September - Medan, Indonesia
  • Average sunshine days in September: 1.9 days

The months with the most sunshine days are February and March (6.3 days).
The month with the least sunshine days is November (1 days).

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Average UV index in September
Medan, Indonesia

Average UV index in September - Medan, Indonesia
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average cloud cover in September
Medan, Indonesia

Average cloud cover in September - Medan, Indonesia
  • Average cloud cover in September: 37

The month with the most cloud cover is November (Cloud cover 45).
The month with the least cloud cover is March (Cloud cover 30).

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Average visibility in September
Medan, Indonesia

Average visibility in September - Medan, Indonesia
  • Average visibility in September: 9km

The months with the highest visibility are February, March, April, June and August (10km).
The months with the lowest visibility are January, May, July, September, October, November and December (9km).

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Medan, Indonesia

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