September weather forecastChanthaburi, Thailand

Weather in September

September in Chanthaburi is marked by a noticeable reduction in rain, signaling the city's progression towards the dry season. The days get shorter and the humidity starts to recede, albeit slowly. A drop in average rainfall to 498mm (19.61") in September, finally marks a noticeable change from the wet season. The city generally remains vibrant during this month, marking the gradual return to dry conditions. As September ends, the population looks forward with anticipation to the dry spell starting in earnest the following month.

Temperature

The transition into September shows a subtle variation to a still hot 31.4°C (88.5°F) from August's 31.2°C (88.2°F) in the average high-temperature. Chanthaburi, during the nights of September, experiences an average temperature drop to a warm 24.4°C (75.9°F).

Heat index

Throughout September, the heat index is appraised at a blazing hot 45°C (113°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

With an average relative humidity of 86%, September is the most humid month.

Rainfall

In Chanthaburi, during September, the rain falls for 25 days and regularly aggregates up to 498mm (19.61") of precipitation. In Chanthaburi, during the entire year, the rain falls for 171 days and collects up to 2994mm (117.87") of precipitation.

Daylight

The average length of the day in September is 12h and 12min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:22. On the last day of September, sunrise is at 06:00 and sunset at 18:02 +07.