September weather forecast
Hiripitiya, Sri Lanka

The first month of the autumn, September, is also a hot month in Hiripitiya, Sri Lanka, with an average temperature varying between 31.2°C (88.2°F) and 22.3°C (72.1°F).

Temperature

Transitioning into September, Hiripitiya experiences an average high-temperature of a still hot 31.2°C (88.2°F), marking a minor shift from the preceding month. Hiripitiya's average low-temperature for the month of September records at an agreeable 22.3°C (72.1°F).

Heat index

September's average heat index is evaluated at a sweltering 39°C (102.2°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
When assessing, remember that heat index measurements are for light winds and shaded spots. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

March and September, with an average relative humidity of 72%, are the least humid months.

Rainfall

In Hiripitiya, in September, it is raining for 15.2 days, with typically 72mm (2.83") of accumulated precipitation. Throughout the year, there are 217.7 rainfall days, and 1165mm (45.87") of precipitation is accumulated.

Daylight

In Hiripitiya, the average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 06:00 and sunset at 18:16. On the last day of the month, sunrise is at 05:56 and sunset at 18:00 +0530.

Sunshine

In Hiripitiya, the average sunshine in September is 10.5h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.