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September Weather in Viengthong, Laos

Last updated: August 23, 2025

In September, the average temperature in Viengthong, Laos hovers around 23°C (73°F), making it a pleasant time to visit. Expect minimum temperatures to dip to 13°C (56°F) and maximums to rise to a balmy 31°C (88°F). However, be prepared for some rain, with precipitation averaging 152 mm (6.0 in) over the course of 22 days. Don't forget to stay hydrated, as the average humidity sits at a sticky 82%!

September Temperature in Viengthong

In September in Viengthong, the average temperature is 23°C (73°F), with maximums reaching 31°C (88°F) and minimums dropping to as low as 13°C (56°F). This pleasant climate makes it an ideal time for travelers to explore the area's attractions comfortably.

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

The chart illustrates September temperature patterns in Viengthong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viengthong, September typically has an average temperature of 23°C (73°F), with highs reaching up to 31°C (88°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec606268707375747373696559
Data source: Temperature data for Viengthong generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Viengthong

In Viengthong in September, the total precipitation amount is 152 mm (6.0 in) spread over 22 days.

September Precipitation Trends in Viengthong

The chart displays monthly precipitation patterns in Viengthong, 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 Viengthong, September typically receives around 152 mm (6.0 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec2625601481651962603471521011918
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Viengthong

In Viengthong in September, humidity is 82%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities feel a bit more strenuous but offering a tropical ambiance perfect for leisurely strolls and relaxed sightseeing.

September Average Humidity in Viengthong

This chart illustrates the average monthly humidity levels in Viengthong, 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 Viengthong is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%65%57%50%68%79%91%92%82%76%72%68%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Viengthong

In Viengthong 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 Viengthong, you can check here.

Maximum UV Index Levels in Viengthong for September

The chart shows the monthly maximum UV Index (UVI) for Viengthong 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 Viengthong typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111313151415151413108
Data source: Viengthong 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 Viengthong Compares to Other Months

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

This table compares monthly weather conditions in Viengthong, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (60°F)26 mm (1.0 inches)63%very high
February Weather17°C (62°F)25 mm (1.0 inches)65%extreme
March Weather20°C (68°F)60 mm (2.3 inches)57%extreme
April Weather21°C (70°F)148 mm (5.8 inches)50%extreme
May Weather23°C (73°F)165 mm (6.5 inches)68%extreme
June Weather24°C (75°F)196 mm (7.7 inches)79%extreme
July Weather23°C (74°F)260 mm (10.2 inches)91%extreme
August Weather23°C (73°F)347 mm (13.7 inches)92%extreme
September Weather23°C (73°F)152 mm (6.0 inches)82%extreme
October Weather21°C (69°F)101 mm (4.0 inches)76%extreme
November Weather18°C (65°F)19 mm (0.7 inches)72%very high
December Weather15°C (59°F)18 mm (0.7 inches)68%very high

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