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September Weather in Chi Thanh, Vietnam

Last updated: August 28, 2025

In September, the average temperature in Chi Thanh, Vietnam is a warm 28°C (84°F), with a typical minimum of 25°C (77°F) and a maximum reaching 35°C (95°F). Be prepared for a humid environment, as the average humidity hovers around 88%. Additionally, expect about 143 mm (5.6 in) of precipitation spread over 22 days throughout the month.

September Temperature in Chi Thanh

In September in Chi Thanh, the average temperature is 28°C (84°F), with maximums reaching 35°C (95°F) and minimums dropping to 25°C (77°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities in Chi Thanh.

September Weather in Chi Thanh: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Chi Thanh, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chi Thanh, September typically has an average temperature of 28°C (84°F), with highs reaching up to 35°C (95°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec757578808385858583817876
Data source: Temperature data for Chi Thanh 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 Chi Thanh

In Chi Thanh in September, the total precipitation amount is 143 mm (5.6 in) spread over 22 days.

September Precipitation Trends in Chi Thanh

The chart displays monthly precipitation patterns in Chi Thanh, 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 Chi Thanh, September typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec121664067105886668143328480277
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chi Thanh

In Chi Thanh in September, humidity is 88%. With an average temperature of 28°C (84°F), this humidity feels like a tropical sauna, making travel feel heavy and sticky, as each step through the thick air can be both exhausting and draining.

September Average Humidity in Chi Thanh

This chart illustrates the average monthly humidity levels in Chi Thanh, 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 Chi Thanh is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%79%75%72%78%85%84%87%88%89%91%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chi Thanh

In Chi Thanh 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 Chi Thanh, you can check here.

Maximum UV Index Levels in Chi Thanh for September

The chart shows the monthly maximum UV Index (UVI) for Chi Thanh 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 Chi Thanh typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11131515141314141413119
Data source: Chi Thanh 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 Chi Thanh Compares to Other Months

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

This table compares monthly weather conditions in Chi Thanh, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)121 mm (4.8 inches)84%extreme
February Weather24°C (75°F)66 mm (2.6 inches)79%extreme
March Weather26°C (78°F)40 mm (1.6 inches)75%extreme
April Weather27°C (81°F)67 mm (2.6 inches)72%extreme
May Weather29°C (84°F)105 mm (4.1 inches)77%extreme
June Weather30°C (85°F)88 mm (3.5 inches)85%extreme
July Weather29°C (85°F)66 mm (2.6 inches)84%extreme
August Weather30°C (86°F)68 mm (2.7 inches)87%extreme
September Weather28°C (84°F)143 mm (5.6 inches)88%extreme
October Weather27°C (81°F)328 mm (12.9 inches)89%extreme
November Weather26°C (79°F)480 mm (18.9 inches)91%extreme
December Weather24°C (76°F)277 mm (10.9 inches)89%very high

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