May Weather in Phayao, Thailand

Last updated: August 27, 2025

In Phayao, Thailand, the average temperature for May is a warm 29°C (85°F). You can expect temperatures to range from a comfortable 21°C (71°F) to a sizzling 42°C (108°F). During this month, precipitation averages 124 mm (4.9 in) over approximately 17 days, contributing to an overall humidity level of 63%.

May Temperature in Phayao

In May in Phayao, the average temperature is 29°C (85°F). Maximums can reach 42°C (108°F), and minimums can be as low as 21°C (71°F). Travelers should be prepared for hot days and warm nights during this time.

May Weather in Phayao: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Phayao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Phayao, May typically has an average temperature of 29°C (85°F), with highs reaching up to 42°C (108°F) and lows dropping to around 21°C (71°F).

Data source: Temperature data for Phayao generated using information from the Copernicus Climate Change Service.

May Precipitation in Phayao

In Phayao in May, the precipitation amount is 124 mm (4.9 in) over the course of 17 days.

May Precipitation Trends in Phayao

The chart displays monthly precipitation patterns in Phayao, 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 Phayao, May typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 17 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Phayao

In Phayao in May humidity is 63%. With an average temperature of 29°C (85°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and slightly drained, making it essential to stay hydrated and take breaks in shaded areas.

May Average Humidity in Phayao

This chart illustrates the average monthly humidity levels in Phayao, 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 Phayao is approximately 63%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Phayao

In Phayao 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 Phayao, you can check here.

Maximum UV Index Levels in Phayao for May

The chart shows the monthly maximum UV Index (UVI) for Phayao 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 Phayao typically reaches 14, which falls under the extreme exposure category.

Data source: Phayao 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 Phayao Compares to Other Months

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

This table compares monthly weather conditions in Phayao, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	22°C (72°F)	23 mm (0.9 inches)	51%	very high
February Weather	24°C (75°F)	9 mm (0.4 inches)	46%	very high
March Weather	28°C (82°F)	4 mm (0.2 inches)	38%	extreme
April Weather	29°C (84°F)	109 mm (4.3 inches)	36%	extreme
May Weather	29°C (85°F)	124 mm (4.9 inches)	63%	extreme
June Weather	29°C (84°F)	161 mm (6.3 inches)	81%	extreme
July Weather	28°C (83°F)	228 mm (9.0 inches)	83%	extreme
August Weather	28°C (82°F)	263 mm (10.4 inches)	91%	extreme
September Weather	28°C (82°F)	177 mm (7.0 inches)	83%	extreme
October Weather	27°C (80°F)	132 mm (5.2 inches)	67%	extreme
November Weather	25°C (77°F)	21 mm (0.8 inches)	60%	very high
December Weather	22°C (72°F)	18 mm (0.7 inches)	56%	very high