May Weather in Si Thep, Thailand

Last updated: August 27, 2025

In May, the average temperature in Si Thep, Thailand hovers around 30°C (86°F), with a pleasant minimum of 22°C (72°F) and a scorching maximum of 40°C (104°F). Expect about 130 mm (5.1 in) of precipitation spread over approximately 21 days, contributing to an average humidity level of 76%. Be prepared for a warm and somewhat humid climate!

May Temperature in Si Thep

In May in Si Thep, the average temperature is 30°C (86°F), with maximums reaching up to 40°C (104°F) and minimums dropping as low as 22°C (72°F). This warm and sunny weather makes it an ideal destination for beachgoers and outdoor enthusiasts.

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

The chart illustrates May temperature patterns in Si Thep, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Thep, May typically has an average temperature of 30°C (86°F), with highs reaching up to 40°C (104°F) and lows dropping to around 22°C (72°F).

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

May Precipitation in Si Thep

In Si Thep in May, the precipitation amount reaches 130 mm (5.1 in) over the course of 21 days.

May Precipitation Trends in Si Thep

The chart displays monthly precipitation patterns in Si Thep, 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 Thep, May typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 21 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Si Thep

In Si Thep in May, humidity is 76%. With an average temperature of 30°C (86°F), this humidity feels like wrapping yourself in a warm, damp blanket, making it quite uncomfortable for traveling. The thick, heavy air can leave you feeling sticky, fatigued, and in need of frequent breaks to stay hydrated and cool.

May Average Humidity in Si Thep

This chart illustrates the average monthly humidity levels in Si Thep, 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 Thep is approximately 76%, 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 Thep

In Si Thep 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 Thep, you can check here.

Maximum UV Index Levels in Si Thep for May

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

Data source: Si Thep 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 Thep Compares to Other Months

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

This table compares monthly weather conditions in Si Thep, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (80°F)	7 mm (0.3 inches)	50%	very high
February Weather	27°C (82°F)	18 mm (0.7 inches)	47%	extreme
March Weather	30°C (86°F)	30 mm (1.2 inches)	41%	extreme
April Weather	30°C (87°F)	83 mm (3.3 inches)	51%	extreme
May Weather	30°C (86°F)	130 mm (5.1 inches)	76%	extreme
June Weather	30°C (86°F)	159 mm (6.3 inches)	83%	extreme
July Weather	29°C (84°F)	245 mm (9.6 inches)	80%	extreme
August Weather	28°C (83°F)	266 mm (10.5 inches)	85%	extreme
September Weather	28°C (83°F)	251 mm (9.9 inches)	88%	extreme
October Weather	28°C (83°F)	177 mm (7.0 inches)	79%	extreme
November Weather	27°C (82°F)	15 mm (0.6 inches)	68%	very high
December Weather	26°C (79°F)	7 mm (0.3 inches)	59%	very high