May Weather in Si Wilai, Thailand

Last updated: August 27, 2025

In Si Wilai, Thailand, the average temperature in May hovers around 29°C (84°F), with a minimum of 22°C (71°F) and occasionally peaking at a scorching 40°C (104°F). Be prepared for some rain, as precipitation amounts can reach 241 mm (9.5 in) over 22 days, contributing to an average humidity of 67%.

May Temperature in Si Wilai

In May in Si Wilai, the average temperature is 29°C (84°F), with maximums reaching up to 40°C (104°F) and minimums dropping as low as 22°C (71°F). Travelers should be prepared for warm weather while enjoying their time in Si Wilai.

May Weather in Si Wilai: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Si Wilai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Wilai, May typically has an average temperature of 29°C (84°F), with highs reaching up to 40°C (104°F) and lows dropping to around 22°C (71°F).

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

May Precipitation in Si Wilai

In Si Wilai in May, the total precipitation amount is 241 mm (9.5 in) distributed over 22 days.

May Precipitation Trends in Si Wilai

The chart displays monthly precipitation patterns in Si Wilai, 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 Si Wilai, May typically receives around 241 mm (9.5 inches) of precipitation spread over approximately 22 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 Si Wilai

In Si Wilai in May, humidity is 67%. With an average temperature of 29°C (84°F), this humidity feels like walking through a warm, damp blanket that clings to your skin, making outdoor activities a bit more strenuous and necessitating plenty of water breaks for a comfortable travel experience.

May Average Humidity in Si Wilai

This chart illustrates the average monthly humidity levels in Si Wilai, 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 Si Wilai is approximately 67%, 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 Si Wilai

In Si Wilai 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 Si Wilai, you can check here.

Maximum UV Index Levels in Si Wilai for May

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

Data source: Si Wilai 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 Si Wilai Compares to Other Months

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

This table compares monthly weather conditions in Si Wilai, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (73°F)	7 mm (0.3 inches)	65%	very high
February Weather	24°C (75°F)	12 mm (0.5 inches)	63%	extreme
March Weather	27°C (81°F)	42 mm (1.7 inches)	54%	extreme
April Weather	29°C (84°F)	70 mm (2.8 inches)	47%	extreme
May Weather	29°C (84°F)	241 mm (9.5 inches)	67%	extreme
June Weather	28°C (83°F)	362 mm (14.3 inches)	81%	extreme
July Weather	28°C (82°F)	510 mm (20.1 inches)	92%	extreme
August Weather	28°C (82°F)	506 mm (19.9 inches)	93%	extreme
September Weather	28°C (83°F)	279 mm (11.0 inches)	85%	extreme
October Weather	27°C (81°F)	132 mm (5.2 inches)	78%	extreme
November Weather	25°C (78°F)	16 mm (0.6 inches)	73%	very high
December Weather	22°C (72°F)	3 mm (0.1 inches)	69%	very high