September weather forecast
Galhinna, Sri Lanka

September, the first month of the autumn in Galhinna, is still a hot month, with an average temperature fluctuating between 31.2°C (88.2°F) and 22.3°C (72.1°F).

Temperature

Galhinna notes an average high-temperature of a still hot 31.2°C (88.2°F) in September, displaying minor variation from August. Galhinna records an average temperature drop to an agreeable 22.3°C (72.1°F) in September.

Heat index

For most parts of September, the heat index is calculated to be a sweltering 39°C (102.2°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

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

Rainfall

In Galhinna, during September, the rain falls for 15.2 days and regularly aggregates up to 72mm (2.83") of precipitation. Throughout the year, there are 217.7 rainfall days, and 1165mm (45.87") of precipitation is accumulated.

Daylight

In Galhinna, the average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 05:59 and sunset at 18:15. On the last day of the month, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

The average sunshine in September is 10.5h.

UV index

March through September, 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 threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. 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. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.