September weather forecast
Cốc Lếu, Vietnam

The first month of the autumn, September, is still a tropical month in Cốc Lếu, Vietnam, with an average temperature varying between 18.7°C (65.7°F) and 30°C (86°F).

Temperature

In September, Cốc Lếu experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 31°C (87.8°F) in August to a still tropical 30°C (86°F). An average minimum temperature of 18.7°C (65.7°F) marks the month of September in Cốc Lếu, Vietnam.

Heat index

In September, the heat index is estimated at a sweltering 37°C (98.6°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Cốc Lếu, the average relative humidity in September is 77%.

Rainfall

In Cốc Lếu, in September, it is raining for 20.4 days, with typically 69mm (2.72") of accumulated precipitation. Throughout the year, there are 188.3 rainfall days, and 770mm (30.31") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 17min.
On the first day of the month, sunrise is at 05:46 and sunset at 18:21. On the last day of September, sunrise is at 05:55 and sunset at 17:52 +07.

Sunshine

The average sunshine in September is 10.2h.

UV index

March through September, with an average maximum UV index of 6, are months with the highest UV index in Cốc Lếu, Vietnam. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.