September weather forecast
Haliyadda, Sri Lanka

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

Temperature

At the onset of September, Haliyadda records an average high-temperature of a still warm 29.5°C (85.1°F), showing little deviation from the preceding month. An average low-temperature of 21.1°C (70°F) is anticipated throughout the nights in Haliyadda during September.

Heat index

The average heat index in September is calculated to be a very hot 35°C (95°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Records show heat index calculations are tailored for shaded regions and mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. 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 highly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Haliyadda, in September, during 23.4 rainfall days, 118mm (4.65") of precipitation is typically accumulated. Throughout the year, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.

Daylight

In Haliyadda, the average length of the day in September is 12h and 10min.
On the first day of September in Haliyadda, sunrise is at 05:59 and sunset at 18:14. On the last day of the month, sunrise is at 05:54 and sunset at 17:58 +0530.

Sunshine

In Haliyadda, Sri Lanka, the average sunshine in September is 10.3h.

UV index

The months with the highest UV index in Haliyadda are January through September, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, a daily UV index of 6 turns into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Enhance your sun protection with tightly woven, yet airy clothing.