September weather forecast
Rathkarawwa, Sri Lanka

September, the first month of the autumn in Rathkarawwa, is still a hot month, with temperature in the range of an average high of 30.1°C (86.2°F) and an average low of 26°C (78.8°F).

Temperature

In September, Rathkarawwa notes an average high-temperature of a still tropical 30.1°C (86.2°F), hardly different from the preceding month. Throughout the nights in September, Rathkarawwa notes an average low of 26°C (78.8°F), a small dip from the daytime peak.

Heat index

For September, the heat index is evaluated at a torrid 37°C (98.6°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', evaluates the perceived heat by adding the effect of moisture in the air. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Rathkarawwa, in September, during 14.4 rainfall days, 48mm (1.89") of precipitation is typically accumulated. In Rathkarawwa, during the entire year, the rain falls for 192.9 days and collects up to 942mm (37.09") of precipitation.

Daylight

The average length of the day in September in Rathkarawwa is 12h and 10min.
On the first day of the month, sunrise is at 05:58 and sunset at 18:13. On the last day of September, in Rathkarawwa, sunrise is at 05:54 and sunset at 17:58 +0530.

Sunshine

The average sunshine in September in Rathkarawwa is 10.7h.

UV index

January through September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Shun overexposure. Protection from sun ravages is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.