September Weather in Li, Thailand

Last updated: August 27, 2025

In September, the average temperature in Li, Thailand is a warm 26°C (80°F), with daily highs reaching up to 35°C (95°F) and lows dipping to a comfortable 21°C (70°F). Be prepared for frequent rain, as the region sees about 256 mm (10.1 in) of precipitation spread across 25 days. The atmosphere can feel quite humid, with average humidity levels at 84%.

September Temperature in Li

In September in Li, the average temperature is 26°C (80°F). Maximums can reach 35°C (95°F), while minimums can drop to 21°C (70°F). This warm climate is ideal for travelers seeking sunny days and outdoor activities.

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

The chart illustrates September temperature patterns in Li, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Li, September typically has an average temperature of 26°C (80°F), with highs reaching up to 35°C (95°F) and lows dropping to around 21°C (70°F).

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

September Precipitation in Li

In Li in September, the precipitation amount is 256 mm (10.1 in) over the course of 25 days.

September Precipitation Trends in Li

The chart displays monthly precipitation patterns in Li, 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 Li, September typically receives around 256 mm (10.1 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 Li

In Li in September, humidity is 84%. With an average temperature of 26°C (80°F), this humidity feels like a warm blanket enveloping you, making travel feel sticky and intense, often leaving you longing for a cool breeze or a shaded spot to escape the heat.

September Average Humidity in Li

This chart illustrates the average monthly humidity levels in Li, 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 Li 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 Li

In Li 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 Li, you can check here.

Maximum UV Index Levels in Li for September

The chart shows the monthly maximum UV Index (UVI) for Li 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 Li typically reaches 14, which falls under the extreme exposure category.

Data source: Li 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 Li Compares to Other Months

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

This table compares monthly weather conditions in Li, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (73°F)	15 mm (0.6 inches)	51%	very high
February Weather	24°C (76°F)	2 mm (0.1 inches)	48%	extreme
March Weather	28°C (82°F)	3 mm (0.1 inches)	45%	extreme
April Weather	28°C (83°F)	80 mm (3.1 inches)	49%	extreme
May Weather	28°C (83°F)	161 mm (6.3 inches)	71%	extreme
June Weather	27°C (81°F)	156 mm (6.1 inches)	84%	extreme
July Weather	27°C (80°F)	214 mm (8.4 inches)	84%	extreme
August Weather	26°C (80°F)	303 mm (11.9 inches)	87%	extreme
September Weather	26°C (80°F)	256 mm (10.1 inches)	84%	extreme
October Weather	26°C (78°F)	196 mm (7.7 inches)	71%	extreme
November Weather	24°C (76°F)	51 mm (2.0 inches)	62%	very high
December Weather	22°C (71°F)	20 mm (0.8 inches)	55%	very high