September Weather in Sainyabuli, Laos

Last updated: August 23, 2025

In September, the average temperature in Sainyabuli, Laos hovers around 26°C (79°F), with a refreshing minimum of 19°C (67°F) and a warm maximum reaching 34°C (94°F). Expect a significant precipitation total of 262 mm (10.3 in) spread over 25 days, contributing to an average humidity level of 85%. Perfect for those who enjoy a lush, tropical atmosphere!

September Temperature in Sainyabuli

In September in Sainyabuli, the average temperature is 26°C (79°F). Maximum can reach 34°C (94°F) and minimum can be as low as 19°C (67°F). This makes it an ideal time for travelers to enjoy warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Sainyabuli, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sainyabuli, September typically has an average temperature of 26°C (79°F), with highs reaching up to 34°C (94°F) and lows dropping to around 19°C (67°F).

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

September Precipitation in Sainyabuli

In Sainyabuli in September, the precipitation amount is 262 mm (10.3 in) occurring over the course of 25 days.

September Precipitation Trends in Sainyabuli

The chart displays monthly precipitation patterns in Sainyabuli, 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 Sainyabuli, September typically receives around 262 mm (10.3 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 Sainyabuli

In Sainyabuli in September, humidity is 85%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities feel stifling and exhausting for travelers.

September Average Humidity in Sainyabuli

This chart illustrates the average monthly humidity levels in Sainyabuli, 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 Sainyabuli is approximately 85%, 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 Sainyabuli

In Sainyabuli 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 Sainyabuli, you can check here.

Maximum UV Index Levels in Sainyabuli for September

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

Data source: Sainyabuli 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 Sainyabuli Compares to Other Months

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

This table compares monthly weather conditions in Sainyabuli, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	24 mm (1.0 inches)	57%	very high
February Weather	22°C (71°F)	16 mm (0.6 inches)	53%	extreme
March Weather	25°C (76°F)	16 mm (0.6 inches)	45%	extreme
April Weather	26°C (79°F)	90 mm (3.6 inches)	39%	extreme
May Weather	27°C (80°F)	118 mm (4.7 inches)	66%	extreme
June Weather	27°C (80°F)	232 mm (9.1 inches)	79%	extreme
July Weather	26°C (80°F)	337 mm (13.3 inches)	90%	extreme
August Weather	26°C (79°F)	423 mm (16.7 inches)	92%	extreme
September Weather	26°C (79°F)	262 mm (10.3 inches)	85%	extreme
October Weather	25°C (77°F)	164 mm (6.5 inches)	72%	extreme
November Weather	23°C (74°F)	24 mm (0.9 inches)	64%	very high
December Weather	20°C (68°F)	17 mm (0.7 inches)	60%	very high