September weather forecast and climate
Manado, Indonesia

September, the first month of the autumn, in Manado, is still a hot month, with average temperature ranging between min 24°C (75.2°F) and max 30.4°C (86.7°F).

Temperature

In September, the average high-temperature is almost the same as in August - a still tropical 30.4°C (86.7°F). In September, in Manado, the average low-temperature is 24°C (75.2°F).

Heat index

The average heat index in September is appraised at a sweltering 37.7°C (99.9°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, differences in body mass, height, and shape, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The least humid month in Manado, Indonesia, is September, with an average relative humidity of 76%.

Rainfall

The month with the least rainfall in Manado is September when the rain falls for 19.5 days and typically collects 69mm (2.72") of precipitation.

Sea temperature

The month with the coldest seawater in Manado, Indonesia, is September, with an average sea temperature of 28.6°C (83.5°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in September is 12.1h.

Sunshine

With an average of 9.3h of sunshine, September has the most sunshine of the year.

UV index

Months with the highest UV index in Manado are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Manado?

In September, in Manado, the average high-temperature is 30.4°C (86.7°F), and the average low-temperature is 24°C (75.2°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, in September is estimated at 37.7°C (99.9°F).

What is the least humid month in Manado?

With an average relative humidity of 76%, September is the least humid month in Manado.

What is the average humidity in September in Manado?

The average relative humidity in September in Manado, Indonesia, is 76%.

How much does it rain in Manado in September?

In Manado, Indonesia, in September, it is raining for 19.5 days, with typically 69mm (2.72") of accumulated precipitation.

What is the driest month in Manado?

September is the month with the least rainfall. Rain falls for 19.5 days and accumulates 69mm (2.72") of precipitation.

What is the month with the coldest sea water in Manado?

September is the month with the coldest seawater in Manado, Indonesia, with an average sea temperature of 28.6°C (83.5°F).

What is the sea water temperature in September in Manado?

In Manado, in September, the average water temperature is 28.6°C (83.5°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Manado have in September?

The average length of the day in September in Manado is 12.1h.

What month has the most sunshine in Manado?

With an average of 9.3h of sunshine, September has the most sunshine of the year in Manado.

How many hours of sunshine does Manado have in September?

In Manado, the average sunshine in September is 9.3h.

What are the months with the highest UV index in Manado?

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

What are the months with the lowest UV index in Manado?

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

What is the UV index reading in September in Manado?

In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Manado, Indonesia
  • Average high temperature in September: 30.4°C

The warmest month (with the highest average high temperature) is October (30.5°C).
The month with the lowest average high temperature is February (28.1°C).

  • Average low temperature in September: 24°C

The month with the highest average low temperature is May (24.8°C).
The coldest month (with the lowest average low temperature) is March (23.8°C).

Average pressure in September - Manado, Indonesia
  • Average pressure in September: 1010.1mbar

The month with the highest atmospheric pressure is September (1010.1mbar).
The month with the lowest atmospheric pressure is December (1008.5mbar).

Average wind speed in September - Manado, Indonesia
  • Average wind speed in September: 5.7km/h

The windiest month (with the highest average wind speed) is February (8.2km/h).
The calmest month (with the lowest average wind speed) is May (5.3km/h).

Average humidity in September - Manado, Indonesia
  • Average humidity in September: 76%

Months with the highest relative humidity are January, February and March (83%).
The month with the lowest relative humidity is September (76%).

Average rainfall in September - Manado, Indonesia
  • Average rainfall in September: 69mm

The wettest month (with the highest rainfall) is June (161mm).
The driest month (with the least rainfall) is September (69mm).

Average rainfall days in September - Manado, Indonesia
  • Average rainfall days in September: 19.5 days

The month with the highest number of rainy days is May (28.3 days).
The month with the least rainy days is September (19.5 days).

Average sea temperature in September - Manado, Indonesia
  • Average sea temperature in September: 28.6°C

The best month for swimming (with the highest average sea temperature) is May (29.8°C).
The coldest month (with the lowest average sea temperature) is September (28.6°C).

Average daylight in September / Average sunshine in September - Manado, Indonesia
  • Average daylight in September: 12.1h

Months with the longest days are April, May, June, July and August (Average daylight: 12.2h).
Months with the shortest days are January and December (Average daylight: 12h).

  • Average sunshine in September: 9.3h

The month with the most sunshine is September (Average sunshine: 9.3h).
Months with the least sunshine are January and February (Average sunshine: 7.6).

Average sunshine days in September - Manado, Indonesia
  • Average sunshine days in September: 8 days

The month with the most sunshine days is August (8.6 days).
The month with the least sunshine days is November (1 days).

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

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

Average cloud cover in September - Manado, Indonesia
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 29).

Average visibility in September - Manado, Indonesia
  • Average visibility in September: 10km

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