September weather forecast
Surat Thani, Thailand

September brings the highest rainfall of the year to Surat Thani, with average precipitation of 188mm (7.4") over 19 days. This high rainfall makes this month the wettest period of the year. Yet, these weather conditions don't bring drastic changes to the city's temperatures, which hover at a warm range. Despite the frequent rainy days, they do not significantly impact daylight hours, allowing residents and visitors to still enjoy ample daylight. Furthermore, the sea remains at a reliable 29°C (84.2°F), comfortable for water-based activities despite the increased showers.

Temperature

Surat Thani indicates an average high-temperature of a still hot 32.4°C (90.3°F) in September, showing minor variation from August's 32.7°C (90.9°F). Throughout September, an average low-temperature of 23.2°C (73.8°F) is expected.

Heat index

The heat index in September is computed to be a blazing hot 48°C (118.4°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In Surat Thani, Thailand, the average relative humidity in September is 84%.

Rainfall

In Surat Thani, Thailand, in September, during 19 rainfall days, 188mm (7.4") of precipitation is typically accumulated. In Surat Thani, during the entire year, the rain falls for 159 days and collects up to 1622mm (63.86") of precipitation.

Sea temperature

In Surat Thani, Thailand, in September, the average water temperature is 29°C (84.2°F).
Note: Water activities including swimming and diving at temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.

Daylight

The average length of the day in September in Surat Thani is 12h and 11min.
On the first day of September, sunrise is at 06:13 and sunset at 18:31. On the last day of the month, sunrise is at 06:11 and sunset at 18:14 +07.

Sunshine

In Surat Thani, the average sunshine in September is 6h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In September, a regular UV index of 12 translates into these guidelines:
Take every vital safeguard, as unprotected skin and eyes may suffer burns rapidly. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. A sunscreen boasting a minimum SPF of 30 should be generously applied and reapplied even on cloudy days, post swim or outdoor exercise. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.