September Weather in Long, Thailand

Last updated: August 27, 2025

In September, the average temperature in Long, Thailand hovers around 27°C (82°F), with a minimum of 23°C (73°F) and a peak at 35°C (95°F). Expect frequent rain, with 247 mm (9.7 in) of precipitation spread over 25 days, and prepare for a sticky atmosphere with an average humidity of 84%.

September Temperature in Long

In September in Long, the average temperature is 27°C (82°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 23°C (73°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

September Weather in Long: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Long, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Long, September typically has an average temperature of 27°C (82°F), with highs reaching up to 35°C (95°F) and lows dropping to around 23°C (73°F).

Data source: Temperature data for Long generated using information from the Copernicus Climate Change Service.

September Precipitation in Long

In Long in September, the precipitation amount is 247 mm (9.7 in) over the course of 25 days.

September Precipitation Trends in Long

The chart displays monthly precipitation patterns in Long, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Long, September typically receives around 247 mm (9.7 inches) of precipitation spread over approximately 25 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Long

In Long in September humidity is 84%. With an average temperature of 27°C (82°F), this humidity feels like walking through a warm, damp blanket, making travel feel heavier and more exhausting.

September Average Humidity in Long

This chart illustrates the average monthly humidity levels in Long, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Long is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Long

In Long in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Long, you can check here.

Maximum UV Index Levels in Long for September

The chart shows the monthly maximum UV Index (UVI) for Long in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Long typically reaches 14, which falls under the extreme exposure category.

Data source: Long September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Long Compares to Other Months

Weather in Long varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Long, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Long, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	23 mm (0.9 inches)	51%	very high
February Weather	25°C (77°F)	11 mm (0.4 inches)	48%	extreme
March Weather	28°C (84°F)	8 mm (0.3 inches)	45%	extreme
April Weather	29°C (85°F)	87 mm (3.4 inches)	49%	extreme
May Weather	29°C (85°F)	148 mm (5.8 inches)	71%	extreme
June Weather	28°C (84°F)	223 mm (8.8 inches)	84%	extreme
July Weather	28°C (82°F)	237 mm (9.3 inches)	84%	extreme
August Weather	27°C (81°F)	371 mm (14.6 inches)	87%	extreme
September Weather	27°C (82°F)	247 mm (9.7 inches)	84%	extreme
October Weather	27°C (81°F)	166 mm (6.5 inches)	71%	extreme
November Weather	26°C (79°F)	30 mm (1.2 inches)	62%	very high
December Weather	23°C (74°F)	18 mm (0.7 inches)	55%	very high