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September Weather in Viangxai, Laos

Last updated: August 23, 2025

In September, the average temperature in Viangxai, Laos is a comfortable 24°C (75°F). You'll experience a minimum of 15°C (60°F) and a delightful maximum of 32°C (90°F). However, be prepared for some rainfall, as the area sees an average precipitation of 164 mm (6.5 in) spread over 22 days. With humidity levels at a steamy 82%, it's a perfect time to embrace the warmth while staying hydrated!

September Temperature in Viangxai

In September in Viangxai, the average temperature is 24°C (75°F), with maximums reaching up to 32°C (90°F) and minimums dropping to as low as 15°C (60°F). This pleasant climate makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in Viangxai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viangxai, September typically has an average temperature of 24°C (75°F), with highs reaching up to 32°C (90°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec606169717578777675706559
Data source: Temperature data for Viangxai 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 Viangxai

In Viangxai in September, the precipitation amount is 164 mm (6.5 in) over the course of 22 days.

September Precipitation Trends in Viangxai

The chart displays monthly precipitation patterns in Viangxai, 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 Viangxai, September typically receives around 164 mm (6.5 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec2825671201741772733381641483226
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Viangxai

In Viangxai in September, humidity is 82%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making travel feel sticky and heavy on the skin, often requiring more frequent breaks and hydration.

September Average Humidity in Viangxai

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

In Viangxai 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 Viangxai, you can check here.

Maximum UV Index Levels in Viangxai for September

The chart shows the monthly maximum UV Index (UVI) for Viangxai 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 Viangxai typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111313141415141412108
Data source: Viangxai 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 Viangxai Compares to Other Months

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

This table compares monthly weather conditions in Viangxai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (60°F)28 mm (1.1 inches)63%very high
February Weather16°C (62°F)25 mm (1.0 inches)65%extreme
March Weather20°C (69°F)67 mm (2.7 inches)57%extreme
April Weather22°C (71°F)120 mm (4.7 inches)50%extreme
May Weather24°C (76°F)174 mm (6.9 inches)68%extreme
June Weather26°C (78°F)177 mm (7.0 inches)79%extreme
July Weather25°C (77°F)273 mm (10.8 inches)91%extreme
August Weather24°C (76°F)338 mm (13.3 inches)92%extreme
September Weather24°C (75°F)164 mm (6.5 inches)82%extreme
October Weather21°C (70°F)148 mm (5.8 inches)76%extreme
November Weather19°C (66°F)32 mm (1.3 inches)72%very high
December Weather15°C (59°F)26 mm (1.0 inches)68%very high

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