September weather forecast
Chi Ngãi, Vietnam

September, the first month of the autumn in Chi Ngãi, is still a hot month, with an average temperature fluctuating between 31.5°C (88.7°F) and 23.8°C (74.8°F).

Temperature

Chi Ngãi marks the onset of September with an average high-temperature of a still hot 31.5°C (88.7°F), subtly divergent from August's 32.6°C (90.7°F). September nights in Chi Ngãi experience a consistent temperature drop to a moderately hot 23.8°C (74.8°F).

Heat index

The heat index value for September is estimated at a blisteringly hot 42°C (107.6°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Heat index evaluations are typically in the context of light winds and shaded environments. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The average relative humidity in September is 79%.

Rainfall

In Chi Ngãi, Vietnam, in September, it is raining for 14.4 days, with typically 37mm (1.46") of accumulated precipitation. Throughout the year, there are 165.7 rainfall days, and 431mm (16.97") of precipitation is accumulated.

Daylight

In September, the average length of the day in Chi Ngãi is 12h and 16min.
On the first day of September, sunrise is at 05:38 and sunset at 18:10. On the last day of the month, sunrise is at 05:45 and sunset at 17:43 +07.

Sunshine

In September, the average sunshine in Chi Ngãi, Vietnam, is 9.2h.

UV index

May through September, 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 risk from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.