May Weather in Phen, Thailand

Last updated: August 27, 2025

In May, the average temperature in Phen, Thailand is a warm 29°C (85°F), with minimums dipping to 22°C (72°F) and soaring maximums reaching up to 40°C (105°F). Rainfall is fairly frequent, totaling 216 mm (8.5 in) over 20 days, while the air hangs heavy with an average humidity of 65%. Enjoy the warmth but be prepared for the occasional downpour!

May Temperature in Phen

In May in Phen, the average temperature is 29°C (85°F), with maximums reaching 40°C (105°F) and minimums dipping as low as 22°C (72°F). This warm climate makes it an ideal destination for travelers seeking sunny adventures and outdoor activities.

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

The chart illustrates May temperature patterns in Phen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Phen, May typically has an average temperature of 29°C (85°F), with highs reaching up to 40°C (105°F) and lows dropping to around 22°C (72°F).

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

May Precipitation in Phen

In Phen in May, the precipitation amount is 216 mm (8.5 in) over a period of 20 days.

May Precipitation Trends in Phen

The chart displays monthly precipitation patterns in Phen, 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 Phen, May typically receives around 216 mm (8.5 inches) of precipitation spread over approximately 20 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 Phen

In Phen in May humidity is 65%. With an average temperature of 29°C (85°F), this humidity feels like a dense, warm blanket enveloping you as you travel, making the air thick and slightly uncomfortable, yet still invigorating for exploring the sights.

May Average Humidity in Phen

This chart illustrates the average monthly humidity levels in Phen, 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 Phen is approximately 65%, 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 Phen

In Phen 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 Phen, you can check here.

Maximum UV Index Levels in Phen for May

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

Data source: Phen 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 Phen Compares to Other Months

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

This table compares monthly weather conditions in Phen, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	4 mm (0.2 inches)	59%	very high
February Weather	25°C (77°F)	12 mm (0.5 inches)	54%	extreme
March Weather	28°C (83°F)	49 mm (1.9 inches)	45%	extreme
April Weather	29°C (85°F)	80 mm (3.1 inches)	40%	extreme
May Weather	29°C (85°F)	216 mm (8.5 inches)	65%	extreme
June Weather	29°C (85°F)	281 mm (11.1 inches)	82%	extreme
July Weather	29°C (84°F)	358 mm (14.1 inches)	90%	extreme
August Weather	28°C (83°F)	402 mm (15.8 inches)	92%	extreme
September Weather	28°C (83°F)	259 mm (10.2 inches)	86%	extreme
October Weather	28°C (82°F)	121 mm (4.8 inches)	80%	extreme
November Weather	26°C (79°F)	10 mm (0.4 inches)	72%	very high
December Weather	23°C (74°F)	5 mm (0.2 inches)	66%	very high