May Weather in Si Chiang Mai, Thailand

Last updated: August 27, 2025

In May, the average temperature in Si Chiang Mai, Thailand reaches a warm 29°C (85°F), with temperatures ranging from a comfortable minimum of 22°C (71°F) to a scorching maximum of 41°C (107°F). Visitors can expect about 204 mm (8.0 in) of precipitation over 21 days, accompanied by an average humidity of 69%.

May Temperature in Si Chiang Mai

In May in Si Chiang Mai, the average temperature is 29°C (85°F). The maximum can reach 41°C (107°F), while the minimum can be as low as 22°C (71°F). It's a perfect time to explore the vibrant outdoor activities and enjoy the local attractions in a warm and inviting environment.

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

The chart illustrates May temperature patterns in Si Chiang Mai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Chiang Mai, May typically has an average temperature of 29°C (85°F), with highs reaching up to 41°C (107°F) and lows dropping to around 22°C (71°F).

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

May Precipitation in Si Chiang Mai

In Si Chiang Mai in May, the precipitation amount is 204 mm (8.0 in) spread over 21 days.

May Precipitation Trends in Si Chiang Mai

The chart displays monthly precipitation patterns in Si Chiang Mai, 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 Chiang Mai, May typically receives around 204 mm (8.0 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 Chiang Mai

In Si Chiang Mai in May humidity is 69%. With an average temperature of 29°C (85°F), this humidity feels like a warm, heavy blanket enveloping you as you travel, making every step a little more laborious and inviting you to seek shaded spots to cool down.

May Average Humidity in Si Chiang Mai

This chart illustrates the average monthly humidity levels in Si Chiang Mai, 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 Chiang Mai is approximately 69%, 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 Chiang Mai

In Si Chiang Mai 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 Chiang Mai, you can check here.

Maximum UV Index Levels in Si Chiang Mai for May

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

Data source: Si Chiang Mai 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 Chiang Mai Compares to Other Months

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

This table compares monthly weather conditions in Si Chiang Mai, 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)	6 mm (0.2 inches)	52%	very high
February Weather	25°C (76°F)	17 mm (0.7 inches)	49%	extreme
March Weather	28°C (82°F)	41 mm (1.6 inches)	39%	extreme
April Weather	29°C (85°F)	70 mm (2.8 inches)	40%	extreme
May Weather	29°C (85°F)	204 mm (8.0 inches)	69%	extreme
June Weather	29°C (85°F)	309 mm (12.2 inches)	81%	extreme
July Weather	29°C (84°F)	331 mm (13.0 inches)	83%	extreme
August Weather	28°C (83°F)	402 mm (15.8 inches)	87%	extreme
September Weather	28°C (83°F)	265 mm (10.4 inches)	86%	extreme
October Weather	28°C (82°F)	129 mm (5.1 inches)	74%	extreme
November Weather	26°C (79°F)	10 mm (0.4 inches)	63%	very high
December Weather	23°C (74°F)	7 mm (0.3 inches)	57%	very high