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September Weather in Chian Yai, Thailand

Last updated: August 27, 2025

In September, the average temperature in Chian Yai, Thailand hovers around 28°C (83°F). You can expect pleasant warmth, with minimum temperatures dipping to 24°C (76°F) and peaking at 34°C (94°F). However, be prepared for some rain, as 125 mm (4.9 in) of precipitation can be expected over the course of 24 days. With an average humidity of 82%, it's a month that feels both warm and humid.

September Temperature in Chian Yai

In September in Chian Yai, the average temperature is 28°C (83°F), with maximums reaching 34°C (94°F) and minimums dipping to around 24°C (76°F). This warm climate makes it an ideal destination for travelers seeking a sunny getaway.

September Weather in Chian Yai: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Chian Yai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chian Yai, September typically has an average temperature of 28°C (83°F), with highs reaching up to 34°C (94°F) and lows dropping to around 24°C (76°F).
JanFebMarAprMayJunJulAugSepOctNovDec808182838383848482828180
Data source: Temperature data for Chian Yai 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 Chian Yai

In Chian Yai in September, the precipitation amount is 125 mm (4.9 in) over the course of 24 days.

September Precipitation Trends in Chian Yai

The chart displays monthly precipitation patterns in Chian Yai, 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 Chian Yai, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec1945057175161978370125239429336
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chian Yai

In Chian Yai in September, humidity is 82%. With an average temperature of 28°C (83°F), this humidity feels like stepping into a warm, damp embrace, which can make traveling feel heavy and exhausting, as every movement can be met with a sticky veil of moisture that clings to the skin.

September Average Humidity in Chian Yai

This chart illustrates the average monthly humidity levels in Chian Yai, 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 Chian Yai is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%74%78%80%76%79%80%83%82%80%83%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chian Yai

In Chian Yai 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 Chian Yai, you can check here.

Maximum UV Index Levels in Chian Yai for September

The chart shows the monthly maximum UV Index (UVI) for Chian Yai 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 Chian Yai typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121416151413131414141211
Data source: Chian Yai 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 Chian Yai Compares to Other Months

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

This table compares monthly weather conditions in Chian Yai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)194 mm (7.6 inches)73%extreme
February Weather27°C (81°F)50 mm (2.0 inches)74%extreme
March Weather28°C (82°F)57 mm (2.3 inches)78%extreme
April Weather28°C (83°F)175 mm (6.9 inches)80%extreme
May Weather29°C (84°F)161 mm (6.3 inches)76%extreme
June Weather29°C (84°F)97 mm (3.8 inches)79%extreme
July Weather29°C (84°F)83 mm (3.3 inches)80%extreme
August Weather29°C (84°F)70 mm (2.7 inches)82%extreme
September Weather28°C (83°F)125 mm (4.9 inches)82%extreme
October Weather28°C (82°F)239 mm (9.4 inches)80%extreme
November Weather27°C (81°F)429 mm (16.9 inches)82%extreme
December Weather27°C (81°F)336 mm (13.2 inches)80%extreme

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