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September Weather in Tan Son, Vietnam

Last updated: August 28, 2025

In Tan Son, Vietnam, the average temperature in September hovers around 25°C (77°F). Expect a diverse range, with minimums dipping to 21°C (69°F) and maximums soaring up to 34°C (93°F). During this month, the region experiences heavy precipitation, with 274 mm (10.8 in) falling over approximately 26 days. Don't forget to stay hydrated with an average humidity level of 87%!

September Temperature in Tan Son

In September in Tan Son, the average temperature is 25°C (77°F). Maximums can reach 34°C (93°F), and minimums can be as low as 21°C (69°F). This pleasant climate makes Tan Son an ideal destination for travelers seeking warm and enjoyable weather.

September Weather in Tan Son: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Tan Son, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tan Son, September typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (93°F) and lows dropping to around 21°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec727276787980797977767472
Data source: Temperature data for Tan Son 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 Tan Son

In Tan Son in September, the precipitation amount is 274 mm (10.8 in) spread over 26 days, indicating a wet period typical for this time of year.

September Precipitation Trends in Tan Son

The chart displays monthly precipitation patterns in Tan Son, 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 Tan Son, September typically receives around 274 mm (10.8 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec4115377020114217118427425321867
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tan Son

In Tan Son in September, humidity is 87%. With an average temperature of 25°C (77°F), this humidity feels like a thick, warm blanket enveloping you, making travel a challenge as sweat clings to your skin and the air feels heavy and stifling.

September Average Humidity in Tan Son

This chart illustrates the average monthly humidity levels in Tan Son, 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 Tan Son is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%78%76%78%84%86%87%87%86%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tan Son

In Tan Son in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Tan Son.

Maximum UV Index Levels in Tan Son for September

The chart shows the monthly maximum UV Index (UVI) for Tan Son 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 Tan Son typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111416151514141515131210
Data source: Tan Son 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 Tan Son Compares to Other Months

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

This table compares monthly weather conditions in Tan Son, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)41 mm (1.6 inches)82%extreme
February Weather22°C (73°F)15 mm (0.6 inches)79%extreme
March Weather24°C (76°F)37 mm (1.5 inches)78%extreme
April Weather25°C (78°F)70 mm (2.7 inches)76%extreme
May Weather26°C (80°F)200 mm (7.9 inches)78%extreme
June Weather27°C (80°F)142 mm (5.6 inches)84%extreme
July Weather26°C (79°F)171 mm (6.7 inches)86%extreme
August Weather26°C (80°F)184 mm (7.2 inches)87%extreme
September Weather25°C (77°F)274 mm (10.8 inches)87%extreme
October Weather24°C (76°F)253 mm (9.9 inches)86%extreme
November Weather24°C (75°F)218 mm (8.6 inches)89%extreme
December Weather22°C (73°F)67 mm (2.6 inches)88%very high

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