September weather forecast and climate
Sigiriya, Sri Lanka

Weather in September

The first month of the autumn, September, is still a tropical month in Sigiriya, Sri Lanka, with average temperature fluctuating between 33.9°C (93°F) and 24.1°C (75.4°F).

Temperature

In Sigiriya, the average high-temperature is relatively the same as in August - a still hot 33.9°C (93°F). In Sigiriya, the average low-temperature is 24.1°C (75.4°F).

Heat index

The average heat index is computed to be a scorching 45°C (113°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, differences in body mass, height, and shape, metabolic differences). 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

Months with the lowest humidity are June through September, with an average relative humidity of 67%.

Rainfall

In Sigiriya, it is raining for 13.5 days, with typically 53mm (2.09") of accumulated precipitation. Throughout the year, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.

Daylight

The average length of the day in Sigiriya, Sri Lanka, is 12.2h.

Sunshine

In Sigiriya, the average sunshine in September is 10.9h.

UV index

Months with the highest UV index are February through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Sigiriya?

In Sigiriya, in September, the average high-temperature is 33.9°C (93°F), and the average low-temperature is 24.1°C (75.4°F). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is computed to be 45°C (113°F).

What is the least humid month in Sigiriya?

Months with the lowest humidity in Sigiriya, Sri Lanka, are June through September, with an average relative humidity of 67%.

What is the average humidity in September in Sigiriya?

The average relative humidity in September is 67%.

How much does it rain in Sigiriya in September?

In Sigiriya, in September, during 13.5 rainfall days, 53mm (2.09") of precipitation is typically accumulated.

How many hours of daylight does Sigiriya have in September?

In Sigiriya, the average length of the day in September is 12.2h.

How long on average sun shines in September in Sigiriya?

In Sigiriya, Sri Lanka, the average sunshine in September is 10.9h.

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

February through October, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in September in Sigiriya?

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Sigiriya, Sri Lanka

Average temperature in September - Sigiriya, Sri Lanka
  • Average high temperature in September: 33.9°C

The warmest month (with the highest average high temperature) is April (34.9°C).
Months with the lowest average high temperature are January and December (29.3°C).

  • Average low temperature in September: 24.1°C

The month with the highest average low temperature is June (24.8°C).
The coldest months (with the lowest average low temperature) are January and February (20°C).

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Average pressure in September
Sigiriya, Sri Lanka

Average pressure in September - Sigiriya, Sri Lanka
  • Average pressure in September: 1008.8mbar

The month with the highest atmospheric pressure is January (1012mbar).
The month with the lowest atmospheric pressure is June (1007.5mbar).

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Average wind speed in September
Sigiriya, Sri Lanka

Average wind speed in September - Sigiriya, Sri Lanka
  • Average wind speed in September: 18.7km/h

The windiest month (with the highest average wind speed) is June (23.8km/h).
The calmest month (with the lowest average wind speed) is April (7.1km/h).

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Average humidity in September
Sigiriya, Sri Lanka

Average humidity in September - Sigiriya, Sri Lanka
  • Average humidity in September: 67%

The month with the highest relative humidity is December (84%).
Months with the lowest relative humidity are June, July, August and September (67%).

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Average rainfall in September
Sigiriya, Sri Lanka

Average rainfall in September - Sigiriya, Sri Lanka
  • Average rainfall in September: 53mm

The wettest month (with the highest rainfall) is October (214mm).
The driest month (with the least rainfall) is June (15mm).

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Average rainfall days in September
Sigiriya, Sri Lanka

Average rainfall days in September - Sigiriya, Sri Lanka
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is November (24.1 days).
The month with the least rainy days is June (7.8 days).

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Average daylight in September /
Average sunshine in September
Sigiriya, Sri Lanka

Average daylight in September / Average sunshine in September - Sigiriya, Sri Lanka
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 12.6h).
Months with the shortest days are January and December (Average daylight: 11.7h).

  • Average sunshine in September: 10.9h

The month with the most sunshine is June (Average sunshine: 11.3h).
The month with the least sunshine is December (Average sunshine: 4.9h).

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Average sunshine days in September
Sigiriya, Sri Lanka

Average sunshine days in September - Sigiriya, Sri Lanka
  • Average sunshine days in September: 13.3 days

The month with the most sunshine days is July (16 days).
The month with the least sunshine days is November (4.2 days).

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Average UV index in September
Sigiriya, Sri Lanka

Average UV index in September - Sigiriya, Sri Lanka
  • Average UV index in September: 7

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 7).
Months with the lowest UV index are January, November and December (UV index 6).

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Average cloud cover in September
Sigiriya, Sri Lanka

Average cloud cover in September - Sigiriya, Sri Lanka
  • Average cloud cover in September: 30

The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is May (Cloud cover 26).

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Average visibility in September
Sigiriya, Sri Lanka

Average visibility in September - Sigiriya, Sri Lanka
  • Average visibility in September: 10km

Months with the highest visibility are May, June, July, August and September (10km).
Months with the lowest visibility are January and December (7km).

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