September weather forecast
Nonagama, Sri Lanka

September, the first month of the autumn in Nonagama, is still a hot month, with an average temperature ranging between min 26°C (78.8°F) and max 30.1°C (86.2°F).

Temperature

The commencement of September brings an average high-temperature of a still hot 30.1°C (86.2°F), marking an inconsequential divergence from August. Throughout September, Nonagama records a steady low-temperature average of 26°C (78.8°F), a minor decrease from its daytime counterpart.

Heat index

The heat index value for September is computed to be a torrid 37°C (98.6°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Nonagama, the average relative humidity in September is 75%.

Rainfall

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

Daylight

In September, the average length of the day in Nonagama is 12h and 9min.
On the first day of the month, sunrise is at 05:59 and sunset at 18:12. On the last day of September, sunrise is at 05:53 and sunset at 17:58 +0530.

Sunshine

The average sunshine in September in Nonagama is 10.7h.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.