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September Weather in Tan Sum, Thailand

Last updated: August 27, 2025

In September, the average temperature in Tan Sum, Thailand reaches a warm 28°C (82°F). Expect a minimum of 23°C (74°F) and bask in highs of up to 35°C (95°F). However, prepare for significant precipitation with 322 mm (12.7 in) falling over 26 days, contributing to an average humidity of 91%. Don't forget your umbrella!

September Temperature in Tan Sum

In September, in Tan Sum, the average temperature is 28°C (82°F). Maximums can reach 35°C (95°F), and minimums can be as low as 23°C (74°F). This makes Tan Sum a warm and pleasant destination for travelers looking to enjoy a sunny getaway.

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

The chart illustrates September temperature patterns in Tan Sum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tan Sum, September typically has an average temperature of 28°C (82°F), with highs reaching up to 35°C (95°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec777984858584828282817977
Data source: Temperature data for Tan Sum 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 Sum

In Tan Sum in September, the precipitation amount reaches 322 mm (12.7 in) over the course of 26 days.

September Precipitation Trends in Tan Sum

The chart displays monthly precipitation patterns in Tan Sum, 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 Sum, September typically receives around 322 mm (12.7 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec552877168201311319322194477
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tan Sum

In Tan Sum in September humidity is 91%. With an average temperature of 28°C (82°F), this humidity feels like a thick blanket wrapping around you, making each step feel heavy and every breath slightly more laborious, which can be quite challenging for traveling.

September Average Humidity in Tan Sum

This chart illustrates the average monthly humidity levels in Tan Sum, 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 Sum is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%65%53%49%73%86%91%93%91%88%85%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tan Sum

In Tan Sum 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 Tan Sum, you can check here.

Maximum UV Index Levels in Tan Sum for September

The chart shows the monthly maximum UV Index (UVI) for Tan Sum 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 Sum typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10131414151315141412109
Data source: Tan Sum 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 Sum Compares to Other Months

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

This table compares monthly weather conditions in Tan Sum, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)5 mm (0.2 inches)74%very high
February Weather26°C (79°F)5 mm (0.2 inches)65%extreme
March Weather29°C (85°F)28 mm (1.1 inches)53%extreme
April Weather29°C (85°F)77 mm (3.0 inches)49%extreme
May Weather29°C (85°F)168 mm (6.6 inches)72%extreme
June Weather29°C (84°F)201 mm (7.9 inches)86%extreme
July Weather28°C (83°F)311 mm (12.2 inches)91%extreme
August Weather28°C (82°F)319 mm (12.5 inches)93%extreme
September Weather28°C (82°F)322 mm (12.7 inches)91%extreme
October Weather27°C (81°F)194 mm (7.6 inches)88%extreme
November Weather26°C (80°F)46 mm (1.8 inches)85%very high
December Weather25°C (77°F)7 mm (0.3 inches)82%very high

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