September weather forecast
Madiwela, Sri Lanka

The first month of the autumn, September, is still a warm month in Madiwela, Sri Lanka, with an average temperature varying between 29.1°C (84.4°F) and 24.9°C (76.8°F).

Temperature

A minor adjustment in Madiwela's average high-temperature is noted with the start of September, touching a still moderately hot 29.1°C (84.4°F) from August's 28.9°C (84°F). Madiwela's nighttime temperatures in September see a subtle dip to an average of 24.9°C (76.8°F).

Heat index

In September, the average heat index is calculated to be a very hot 35°C (95°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant 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 human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In September, the average relative humidity in Madiwela is 81%.

Rainfall

In Madiwela, Sri Lanka, during September, the rain falls for 26.9 days and regularly aggregates up to 206mm (8.11") of precipitation. In Madiwela, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In September, the average length of the day in Madiwela is 12h and 10min.
On the first day of the month, sunrise is at 06:02 and sunset at 18:17. On the last day of September, in Madiwela, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Madiwela, the average sunshine in September is 7.4h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 7 during September leads to these instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Boost your sun resistance with garments that are densely woven yet spacious.