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September Weather in Lai Chau, Vietnam

Last updated: August 28, 2025

In September, the average temperature in Lai Chau, Vietnam hovers around 23°C (74°F), creating a pleasant atmosphere for outdoor activities. Temperatures can dip to a minimum of 15°C (60°F) and peak at a maximum of 32°C (90°F). Be prepared for frequent rain, as the region receives about 217 mm (8.6 in) of precipitation spread over 25 days. With an average humidity level of 81%, the air tends to be quite moist, adding to the region's tropical charm.

September Temperature in Lai Chau

In September in Lai Chau, the average temperature is 23°C (74°F). Maximum temperatures can reach 32°C (90°F), while the minimum can drop to as low as 15°C (60°F). This moderate climate makes Lai Chau an ideal destination for travelers seeking pleasant weather and outdoor activities.

September Weather in Lai Chau: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lai Chau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lai Chau, September typically has an average temperature of 23°C (74°F), with highs reaching up to 32°C (90°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec585965697476757574696458
Data source: Temperature data for Lai Chau 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 Lai Chau

In Lai Chau in September, the precipitation amount is 217 mm (8.6 in) over a span of 25 days.

September Precipitation Trends in Lai Chau

The chart displays monthly precipitation patterns in Lai Chau, 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 Lai Chau, September typically receives around 217 mm (8.6 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec70641371961523113594082181605654
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lai Chau

In Lai Chau in September, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

September Average Humidity in Lai Chau

This chart illustrates the average monthly humidity levels in Lai Chau, 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 Lai Chau is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec57%67%58%53%69%83%90%90%81%75%74%69%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lai Chau

In Lai Chau 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 Lai Chau, you can check here.

Maximum UV Index Levels in Lai Chau for September

The chart shows the monthly maximum UV Index (UVI) for Lai Chau 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 Lai Chau typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810131315141514141297
Data source: Lai Chau 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 Lai Chau Compares to Other Months

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

This table compares monthly weather conditions in Lai Chau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)70 mm (2.8 inches)57%very high
February Weather15°C (59°F)64 mm (2.5 inches)67%very high
March Weather19°C (66°F)137 mm (5.4 inches)58%extreme
April Weather21°C (69°F)196 mm (7.7 inches)53%extreme
May Weather23°C (74°F)152 mm (6.0 inches)69%extreme
June Weather24°C (76°F)311 mm (12.2 inches)83%extreme
July Weather24°C (76°F)359 mm (14.1 inches)90%extreme
August Weather24°C (76°F)408 mm (16.1 inches)90%extreme
September Weather23°C (74°F)217 mm (8.6 inches)81%extreme
October Weather21°C (70°F)160 mm (6.3 inches)75%extreme
November Weather18°C (64°F)56 mm (2.2 inches)74%very high
December Weather14°C (58°F)54 mm (2.1 inches)69%high

Compare Lai Chau's Climate with Cities Worldwide