May Weather in Si Ma Cai, Vietnam

Last updated: August 28, 2025

In May, the average temperature in Si Ma Cai, Vietnam hovers around 23°C (74°F), creating a pleasant climate for outdoor activities. However, temperatures can vary widely, with minimums dipping to 12°C (54°F) and maximums reaching up to 35°C (95°F). Expect 107 mm (4.2 in) of precipitation over 17 days, contributing to an average humidity level of about 69%. 🌦️ Perfect for those who enjoy a balance of sunny and rainy days!

May Temperature in Si Ma Cai

In May in Si Ma Cai, the average temperature is 23°C (74°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 12°C (54°F). This makes Si Ma Cai an ideal destination for travelers looking for warm weather with a comfortable range of temperatures.

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

The chart illustrates May temperature patterns in Si Ma Cai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Si Ma Cai, May typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 12°C (54°F).

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

May Precipitation in Si Ma Cai

In Si Ma Cai in May, the precipitation amount is 107 mm (4.2 in) and occurs over 17 days.

May Precipitation Trends in Si Ma Cai

The chart displays monthly precipitation patterns in Si Ma Cai, 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 Ma Cai, May typically receives around 107 mm (4.2 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 Si Ma Cai

In Si Ma Cai in May humidity is 69%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making outdoor adventures enjoyable yet slightly sticky, perfect for leisurely strolls or exploring local attractions while staying hydrated.

May Average Humidity in Si Ma Cai

This chart illustrates the average monthly humidity levels in Si Ma Cai, 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 Ma Cai 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 Ma Cai

In Si Ma Cai 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 Ma Cai, you can check here.

Maximum UV Index Levels in Si Ma Cai for May

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

Data source: Si Ma Cai 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 Ma Cai Compares to Other Months

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

This table compares monthly weather conditions in Si Ma Cai, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	42 mm (1.7 inches)	57%	very high
February Weather	14°C (58°F)	28 mm (1.1 inches)	67%	very high
March Weather	18°C (65°F)	41 mm (1.6 inches)	58%	extreme
April Weather	20°C (69°F)	92 mm (3.6 inches)	53%	extreme
May Weather	23°C (74°F)	107 mm (4.2 inches)	69%	extreme
June Weather	25°C (77°F)	182 mm (7.2 inches)	83%	extreme
July Weather	24°C (76°F)	329 mm (12.9 inches)	90%	extreme
August Weather	24°C (76°F)	455 mm (17.9 inches)	90%	extreme
September Weather	23°C (74°F)	229 mm (9.0 inches)	81%	extreme
October Weather	20°C (69°F)	156 mm (6.1 inches)	75%	extreme
November Weather	17°C (63°F)	37 mm (1.5 inches)	74%	very high
December Weather	13°C (56°F)	35 mm (1.4 inches)	69%	very high