September weather forecast
Yakkala, Sri Lanka

The first month of the autumn, September, is still a warm month in Yakkala, Sri Lanka, with an average temperature ranging between max 29.5°C (85.1°F) and min 25.2°C (77.4°F).

Temperature

Yakkala's weather, upon September's arrival, documents an average high-temperature of a still moderately hot 29.5°C (85.1°F), nearly identical to the prior month. In Yakkala, September nights experience a modest descent in temperature from daily peaks, cooling down to an average of 25.2°C (77.4°F).

Heat index

September's heat index is appraised at a fiery hot 36°C (96.8°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

The average relative humidity in September in Yakkala is 81%.

Rainfall

In Yakkala, in September, during 24.4 rainfall days, 153mm (6.02") of precipitation is typically accumulated. Throughout the year, in Yakkala, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

In Yakkala, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:02 and sunset at 18:17. On the last day of September, in Yakkala, sunrise is at 05:57 and sunset at 18:01 +0530.

Sunshine

In September, the average sunshine is 7.7h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 7 in September translates into these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.