September weather forecast
Uppodai, Sri Lanka

September, the first month of the autumn in Uppodai, is still a hot month, with an average temperature varying between 31.8°C (89.2°F) and 25.7°C (78.3°F).

Temperature

The commencement of September records an average high-temperature of a still hot 31.8°C (89.2°F), barely varying from August's 32.3°C (90.1°F). Uppodai records an average nighttime low-temperature of 25.7°C (78.3°F) throughout September.

Heat index

During September, the heat index is estimated at an extremely hot 41°C (105.8°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

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

Rainfall

In Uppodai, during September, the rain falls for 22 days and regularly aggregates up to 81mm (3.19") of precipitation. Throughout the year, there are 237.8 rainfall days, and 1259mm (49.57") of precipitation is accumulated.

Daylight

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

Sunshine

In September, the average sunshine in Uppodai, Sri Lanka, 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 estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.