September weather forecast
Mawaramandiya, Sri Lanka

The first month of the autumn, September, is also a moderately hot month in Mawaramandiya, Sri Lanka, with an average temperature varying between 29.1°C (84.4°F) and 24.9°C (76.8°F).

Temperature

The transition into September shows a subtle variation to a still warm 29.1°C (84.4°F) from August's 28.9°C (84°F) in the average high-temperature. Mawaramandiya in September experiences a minor decline in temperature, with an average low of 24.9°C (76.8°F) at night.

Heat index

Throughout September, the heat index is appraised at a very hot 35°C (95°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In September, the average relative humidity in Mawaramandiya is 81%.

Rainfall

In Mawaramandiya, in September, it is raining for 26.9 days, with typically 206mm (8.11") of accumulated precipitation. In Mawaramandiya, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In Mawaramandiya, the average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 06:02 and sunset at 18:17. On the last day of the month, sunrise is at 05:58 and sunset at 18:01 +0530.

Sunshine

The average sunshine in September in Mawaramandiya is 7.4h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.