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September Weather in Den Chai, Thailand

Last updated: August 27, 2025

In Den Chai, Thailand, the average temperature in September reaches a warm 27°C (81°F), with lows dipping to 22°C (73°F) and highs soaring to 35°C (95°F). Prepare for significant rainfall, as 240 mm (9.4 in) of precipitation is expected over 25 days, accompanied by high humidity levels at 84%.

September Temperature in Den Chai

In September in Den Chai, the average temperature is 27°C (81°F). Maximums can reach 35°C (95°F) and minimums can be as low as 22°C (73°F). This pleasant weather makes Den Chai an ideal destination for travelers seeking warmth and sunshine during that time.

September Weather in Den Chai: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Den Chai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Den Chai, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec747683858483828181807973
Data source: Temperature data for Den Chai 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 Den Chai

In Den Chai in September, the precipitation amount is 240 mm (9.4 in) spread over the course of 25 days.

September Precipitation Trends in Den Chai

The chart displays monthly precipitation patterns in Den Chai, 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 Den Chai, September typically receives around 240 mm (9.4 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec27117821422302473912401672719
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Den Chai

In Den Chai in September humidity is 84%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, moist blanket, making travel uncomfortable and sticky, as every step seems to weigh you down with the heavy air.

September Average Humidity in Den Chai

This chart illustrates the average monthly humidity levels in Den Chai, 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 Den Chai is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%48%45%49%71%84%84%87%84%71%62%55%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Den Chai

In Den Chai 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 Den Chai, you can check here.

Maximum UV Index Levels in Den Chai for September

The chart shows the monthly maximum UV Index (UVI) for Den Chai 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 Den Chai typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911121314131414141398
Data source: Den Chai 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 Den Chai Compares to Other Months

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

This table compares monthly weather conditions in Den Chai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)27 mm (1.0 inches)51%very high
February Weather25°C (77°F)11 mm (0.4 inches)48%extreme
March Weather28°C (83°F)7 mm (0.3 inches)45%extreme
April Weather29°C (85°F)82 mm (3.2 inches)49%extreme
May Weather29°C (85°F)142 mm (5.6 inches)71%extreme
June Weather28°C (83°F)230 mm (9.0 inches)84%extreme
July Weather28°C (82°F)247 mm (9.7 inches)84%extreme
August Weather27°C (81°F)390 mm (15.4 inches)87%extreme
September Weather27°C (81°F)240 mm (9.4 inches)84%extreme
October Weather27°C (81°F)167 mm (6.6 inches)71%extreme
November Weather26°C (79°F)27 mm (1.0 inches)62%very high
December Weather23°C (73°F)19 mm (0.7 inches)55%very high

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