September weather forecast
Nochchimunai, Sri Lanka

The first month of the autumn, September, is still a tropical month in Nochchimunai, Sri Lanka, with an average temperature ranging between max 31.8°C (89.2°F) and min 25.7°C (78.3°F).

Temperature

The transition into September is marked with an average high-temperature of a still hot 31.8°C (89.2°F), showing an insignificant shift from August's 32.3°C (90.1°F). September brings an average low-temperature of 25.7°C (78.3°F) to Nochchimunai.

Heat index

September's average heat index is estimated at an extremely hot 41°C (105.8°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

In Nochchimunai, in September, during 22 rainfall days, 81mm (3.19") of precipitation is typically accumulated. In Nochchimunai, Sri Lanka, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Daylight

In Nochchimunai, Sri Lanka, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:10. On the last day of September, sunrise is at 05:51 and sunset at 17:54 +0530.

Sunshine

In September, the average sunshine is 10.7h.

UV index

The months with the highest UV index are January through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.