September weather forecast
Kiều Sơn, Vietnam

The first month of the autumn, September, is still a hot month in Kiều Sơn, Vietnam, with temperature in the range of an average low of 25.2°C (77.4°F) and an average high of 30.8°C (87.4°F).

Temperature

The average high-temperature is a still hot 30.8°C (87.4°F) in September, hardly different from the 31.7°C (89.1°F) recorded in August. Throughout the nights in September, Kiều Sơn experiences an average low-temperature of 25.2°C (77.4°F).

Heat index

The heat index for September is appraised at a scorching 40°C (104°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In Kiều Sơn, the average relative humidity in September is 78%.

Rainfall

In September, the rain falls for 19.9 days. Throughout September, 121mm (4.76") of precipitation is accumulated. In Kiều Sơn, Vietnam, during the entire year, the rain falls for 205.9 days and collects up to 966mm (38.03") of precipitation.

Daylight

The average length of the day in September is 12h and 16min.
On the first day of the month, sunrise is at 05:37 and sunset at 18:09. On the last day of September, sunrise is at 05:44 and sunset at 17:42 +07.

Sunshine

In September, the average sunshine is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Kiều Sơn. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.