September weather forecast
Wattappola, Sri Lanka

September

Weather in September

September, the first month of the autumn in Wattappola, is also a moderately hot month, with an average temperature fluctuating between 29.5°C (85.1°F) and 21.1°C (70°F).

Temperature

The shift into September finds Wattappola at an average high-temperature of a still warm 29.5°C (85.1°F), closely comparable to August's conditions. During September, an average low-temperature of 21.1°C (70°F) is observed in Wattappola.

Heat index

For September, the heat index is estimated at a torrid 35°C (95°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In September, the average relative humidity in Wattappola, Sri Lanka, is 77%.

Rainfall

In Wattappola, Sri Lanka, in September, it is raining for 23.4 days, with typically 118mm (4.65") of accumulated precipitation. In Wattappola, during the entire year, the rain falls for 278.4 days and collects up to 1466mm (57.72") of precipitation.

Daylight

In Wattappola, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:15. On the last day of September, in Wattappola, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

In Wattappola, the average sunshine in September is 10.3h.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: During September, 6 as the daily maximum UV index converts into the following advice:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

How hot is it in Wattappola in September?
In September, the average high-temperature and low-temperature in Wattappola are 29.5°C (85.1°F) and 21.1°C (70°F) respectively. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in September is estimated at 35°C (95°F).
What is the average humidity in September in Wattappola?
The average relative humidity in September in Wattappola is 77%.
How many days does it rain in September in Wattappola?
In Wattappola, in September, during 23.4 rainfall days, 118mm (4.65") of precipitation is typically accumulated.
What is the average length of the day in September in Wattappola?
The average day length in September in Wattappola, Sri Lanka, is 12h and 10min.
When is the sunrise / sunset in September in Wattappola?
In September, on the first day of the month, sunrise is at 06:00 and sunset at 18:15. On the last day of the month, in Wattappola, Sri Lanka, sunrise is at 05:55 and sunset at 17:59 +0530.
How many hours of sunshine does Wattappola have in September?
In September, the average sunshine duration is 10.3h.
When is the highest UV index in Wattappola?
The months with the highest UV index are January through September, November and December, with an average maximum UV index of 6.
What is the UV index reading in September in Wattappola?
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - Wattappola, Sri Lanka
Average temperature in September
Wattappola, Sri Lanka
  • Average high temperature in September: 29.5°C

The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is December (27.5°C).

  • Average low temperature in September: 21.1°C

The months with the highest average low temperature are May and June (21.8°C).
The coldest month (with the lowest average low temperature) is February (18.1°C).

Average pressure in September - Wattappola, Sri Lanka
Average pressure in September
Wattappola, Sri Lanka
  • Average pressure in September: 1009.3mbar

The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).

Average wind speed in September - Wattappola, Sri Lanka
Average wind speed in September
Wattappola, Sri Lanka
  • Average wind speed in September: 10.8km/h

The windiest month (with the highest average wind speed) is June (13.5km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).

Average humidity in September - Wattappola, Sri Lanka
Average humidity in September
Wattappola, Sri Lanka
  • Average humidity in September: 77%

The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is March (74%).

Average rainfall in September - Wattappola, Sri Lanka
Average rainfall in September
Wattappola, Sri Lanka
  • Average rainfall in September: 118mm

The wettest month (with the highest rainfall) is October (301mm).
The driest month (with the least rainfall) is January (38mm).

Average rainfall days in September - Wattappola, Sri Lanka
Average rainfall days in September
Wattappola, Sri Lanka
  • Average rainfall days in September: 23.4 days

The month with the highest number of rainy days is May (28.6 days).
The month with the least rainy days is January (14.1 days).

Average daylight in September / Average sunshine in September - Wattappola, Sri Lanka
Average daylight in September /
Average sunshine in September
Wattappola, Sri Lanka
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).

  • Average sunshine in September: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in September - Wattappola, Sri Lanka
Average sunshine days in September
Wattappola, Sri Lanka
  • Average sunshine days in September: 3.9 days

The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is May (1.2 days).

Average UV index in September - Wattappola, Sri Lanka
Average UV index in September
Wattappola, Sri Lanka
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 6).
The month with the lowest UV index is October (UV index 5).

Average cloud cover in September - Wattappola, Sri Lanka
Average cloud cover in September
Wattappola, Sri Lanka
  • Average cloud cover in September: 34

The months with the most cloud cover are November and December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 27).

Average visibility in September - Wattappola, Sri Lanka
Average visibility in September
Wattappola, Sri Lanka
  • Average visibility in September: 9km

The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, November and December (8km).

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