September weather forecast
Kimbulapitiya, Sri Lanka

September, the first month of the autumn in Kimbulapitiya, is still a warm month, with temperature in the range of an average low of 25.2°C (77.4°F) and an average high of 29.5°C (85.1°F).

Temperature

The onset of September brings an average high-temperature of a still moderately hot 29.5°C (85.1°F), nearly matching the August temperature. In Kimbulapitiya, the nocturnal temperatures throughout September show a marginal dip from the daytime averages, settling at a still moderately hot 25.2°C (77.4°F).

Heat index

For September, the heat index is computed to be a sweltering 36°C (96.8°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

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

Rainfall

In Kimbulapitiya, during September, the rain falls for 24.4 days and regularly aggregates up to 153mm (6.02") of precipitation. In Kimbulapitiya, during the entire year, the rain falls for 265.4 days and collects up to 1744mm (68.66") of precipitation.

Daylight

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

Sunshine

The average sunshine in September is 7.7h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 7 in September translates into this advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.