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May Weather in Chiang Muan, Thailand

Last updated: August 27, 2025

In May, the average temperature in Chiang Muan, Thailand is a warm 28°C (83°F). Expect comfortable evenings with a minimum of 21°C (70°F), while daytime highs can reach a sizzling 40°C (104°F). Be prepared for some rainy days, as precipitation averages 149 mm (5.9 in) over 21 days, and humidity hovers around a pleasant 66%.

May Temperature in Chiang Muan

In May in Chiang Muan, the average temperature is 28°C (83°F). Maximums can reach 40°C (104°F) and minimums can be as low as 21°C (70°F). This makes it an ideal time for travelers who enjoy warm weather and outdoor activities.

May Weather in Chiang Muan: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Chiang Muan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chiang Muan, May typically has an average temperature of 28°C (83°F), with highs reaching up to 40°C (104°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec717481828282818080797670
Data source: Temperature data for Chiang Muan 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.

May Precipitation in Chiang Muan

In Chiang Muan in May, the total precipitation amount is 149 mm (5.9 in) spread over 21 days.

May Precipitation Trends in Chiang Muan

The chart displays monthly precipitation patterns in Chiang Muan, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Chiang Muan, May typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec281371301492223003352351492518
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Chiang Muan

In Chiang Muan in May humidity is 66%. With an average temperature of 28°C (83°F), this humidity feels like walking through a warm blanket, making travel quite uncomfortable and sticky, requiring frequent breaks to hydrate and seek shade.

May Average Humidity in Chiang Muan

This chart illustrates the average monthly humidity levels in Chiang Muan, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Chiang Muan is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec57%53%45%39%66%79%90%92%85%72%64%60%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Chiang Muan

In Chiang Muan in May, 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 Chiang Muan, you can check here.

Maximum UV Index Levels in Chiang Muan for May

The chart shows the monthly maximum UV Index (UVI) for Chiang Muan in May, 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 May, the maximum UV index in Chiang Muan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9101313141314141413108
Data source: Chiang Muan May 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 May Weather in Chiang Muan Compares to Other Months

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

This table compares monthly weather conditions in Chiang Muan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)27 mm (1.1 inches)57%very high
February Weather24°C (75°F)13 mm (0.5 inches)53%very high
March Weather27°C (81°F)7 mm (0.3 inches)45%extreme
April Weather28°C (83°F)130 mm (5.1 inches)39%extreme
May Weather28°C (83°F)149 mm (5.9 inches)66%extreme
June Weather28°C (82°F)222 mm (8.7 inches)79%extreme
July Weather27°C (81°F)300 mm (11.8 inches)90%extreme
August Weather27°C (80°F)335 mm (13.2 inches)92%extreme
September Weather27°C (80°F)235 mm (9.3 inches)85%extreme
October Weather26°C (79°F)149 mm (5.9 inches)72%extreme
November Weather24°C (76°F)25 mm (1.0 inches)64%very high
December Weather21°C (71°F)18 mm (0.7 inches)60%very high

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