September weather forecast
Valaichchenai, Sri Lanka

September, the first month of the autumn in Valaichchenai, is also a hot month, with an average temperature ranging between min 25.7°C (78.3°F) and max 31.8°C (89.2°F).

Temperature

An average high-temperature of a still hot 31.8°C (89.2°F) marks September, exhibiting a close resemblance to the conditions in August. The average low-temperature, in September, is a moderately hot 25.7°C (78.3°F).

Heat index

In September, the average heat index is estimated at a scorching 41°C (105.8°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In Valaichchenai, the average relative humidity in September is 72%.

Rainfall

In Valaichchenai, Sri Lanka, during September, the rain falls for 22 days and regularly aggregates up to 81mm (3.19") of precipitation. In Valaichchenai, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Daylight

The average length of the day in September in Valaichchenai is 12h and 10min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:11. On the last day of September, sunrise is at 05:52 and sunset at 17:55 +0530.

Sunshine

In Valaichchenai, the average sunshine in September is 10.7h.

UV index

The months with the highest UV index in Valaichchenai are January through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.