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May Weather in Phon Sai, Thailand

Last updated: August 27, 2025

In May, the average temperature in Phon Sai, Thailand is 30°C (85°F). Expect a comfortable minimum of 18°C (65°F) and the potential for heat with highs reaching 40°C (104°F). During this period, the region experiences 159 mm (6.3 in) of precipitation spread over 20 days, resulting in an average humidity of 71%.

May Temperature in Phon Sai

In May in Phon Sai, the average temperature is 30°C (85°F). Maximums can reach 40°C (104°F), and minimums can be as low as 18°C (65°F). Be prepared for warm weather and pack accordingly for both the heat and cooler evenings.

May Weather in Phon Sai: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Phon Sai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Phon Sai, May typically has an average temperature of 30°C (85°F), with highs reaching up to 40°C (104°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec767884858585848382817976
Data source: Temperature data for Phon Sai 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 Phon Sai

In Phon Sai in May, the precipitation amount is 159 mm (6.3 in) over the course of 20 days.

May Precipitation Trends in Phon Sai

The chart displays monthly precipitation patterns in Phon Sai, 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 Phon Sai, May typically receives around 159 mm (6.3 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec5103365159139256253303171338
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Phon Sai

In Phon Sai in May humidity is 71%. With an average temperature of 30°C (85°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities feel more intense and requiring frequent breaks to stay hydrated.

May Average Humidity in Phon Sai

This chart illustrates the average monthly humidity levels in Phon Sai, 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 Phon Sai is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec56%50%41%44%71%84%87%90%89%83%74%68%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Phon Sai

In Phon Sai in May, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Phon Sai.

Maximum UV Index Levels in Phon Sai for May

The chart shows the monthly maximum UV Index (UVI) for Phon Sai 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 Phon Sai typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10131415151314141312109
Data source: Phon Sai 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 Phon Sai Compares to Other Months

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

This table compares monthly weather conditions in Phon Sai, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)5 mm (0.2 inches)56%very high
February Weather26°C (78°F)10 mm (0.4 inches)50%extreme
March Weather29°C (84°F)33 mm (1.3 inches)41%extreme
April Weather29°C (85°F)65 mm (2.6 inches)44%extreme
May Weather30°C (85°F)159 mm (6.3 inches)71%extreme
June Weather29°C (85°F)139 mm (5.5 inches)83%extreme
July Weather29°C (84°F)256 mm (10.1 inches)87%extreme
August Weather28°C (83°F)253 mm (10.0 inches)90%extreme
September Weather28°C (83°F)303 mm (11.9 inches)89%extreme
October Weather27°C (81°F)171 mm (6.7 inches)83%extreme
November Weather26°C (80°F)32 mm (1.3 inches)74%very high
December Weather24°C (76°F)8 mm (0.3 inches)68%very high

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