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September Weather in Khon Kaen, Thailand

Last updated: August 27, 2025

In September, the average temperature in Khon Kaen, Thailand is a warm 28°C (83°F), with lows of 23°C (74°F) and highs reaching up to 35°C (96°F). This month also sees significant rainfall, with a total precipitation of 239 mm (9.4 in) spread over 23 days, contributing to an average humidity of 86%. Prepare for a cozy yet humid climate!

September Temperature in Khon Kaen

In September in Khon Kaen, the average temperature is 28°C (83°F). Maximum temperatures can reach 35°C (96°F), while the minimum can dip down to 23°C (74°F). This pleasant climate makes it an ideal time for outdoor activities and exploration.

September Weather in Khon Kaen: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Khon Kaen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Khon Kaen, September typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (96°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec767884868686858483817975
Data source: Temperature data for Khon Kaen 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 Khon Kaen

In Khon Kaen in September, the total precipitation amount is 239 mm (9.4 in), occurring over the course of 23 days.

September Precipitation Trends in Khon Kaen

The chart displays monthly precipitation patterns in Khon Kaen, 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 Khon Kaen, September typically receives around 239 mm (9.4 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec593065158134227200239153306
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Khon Kaen

In Khon Kaen in September humidity is 86%. With an average temperature of 28°C (83°F), this humidity feels like a heavy blanket enveloping you, making every step feel sluggish and every breath a reminder of the tropical heat, which can be quite challenging for traveling.

September Average Humidity in Khon Kaen

This chart illustrates the average monthly humidity levels in Khon Kaen, 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 Khon Kaen is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%54%45%40%65%82%90%92%86%80%72%67%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Khon Kaen

In Khon Kaen in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Khon Kaen.

Maximum UV Index Levels in Khon Kaen for September

The chart shows the monthly maximum UV Index (UVI) for Khon Kaen 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 Khon Kaen typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9121414141315141312109
Data source: Khon Kaen 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 Khon Kaen Compares to Other Months

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

This table compares monthly weather conditions in Khon Kaen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (76°F)5 mm (0.2 inches)59%very high
February Weather26°C (79°F)9 mm (0.4 inches)54%extreme
March Weather29°C (84°F)30 mm (1.2 inches)45%extreme
April Weather30°C (86°F)65 mm (2.6 inches)40%extreme
May Weather30°C (86°F)158 mm (6.2 inches)65%extreme
June Weather30°C (86°F)134 mm (5.3 inches)82%extreme
July Weather29°C (85°F)227 mm (8.9 inches)90%extreme
August Weather29°C (84°F)200 mm (7.9 inches)92%extreme
September Weather28°C (83°F)239 mm (9.4 inches)86%extreme
October Weather27°C (82°F)153 mm (6.0 inches)80%extreme
November Weather26°C (79°F)30 mm (1.2 inches)72%very high
December Weather24°C (75°F)6 mm (0.2 inches)66%very high

Compare Khon Kaen's Climate with Cities Worldwide