September weather forecast
Ranwediyawa, Sri Lanka

The first month of the autumn, September, is still a tropical month in Ranwediyawa, Sri Lanka, with an average temperature ranging between max 33.9°C (93°F) and min 24.1°C (75.4°F).

Temperature

The unfolding of September shows an average high-temperature of a still tropical 33.9°C (93°F), indicating a slight variance from August's 33.7°C (92.7°F). Ranwediyawa's average low-temperature is measured at a moderately hot 24.1°C (75.4°F) during September.

Heat index

The heat index value during September is computed to be a burning hot 45°C (113°F). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The months with the lowest humidity in Ranwediyawa are June through September, with an average relative humidity of 67%.

Rainfall

In Ranwediyawa, during September, the rain falls for 13.5 days and regularly aggregates up to 53mm (2.09") of precipitation. Throughout the year, in Ranwediyawa, Sri Lanka, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 10min.
On the first day of September in Ranwediyawa, 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

In Ranwediyawa, Sri Lanka, the average sunshine in September is 10.9h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. 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. Tightly woven clothing, when worn loosely, shields effectively against the Sun.