May Weather in Santo Tomas La Union, Guatemala

Last updated: August 23, 2025

In May, the average temperature in Santo Tomas La Union, Guatemala hovers around 18°C (65°F), with a comfortable minimum of 13°C (55°F) and a pleasant maximum of 26°C (79°F). Be prepared for generous precipitation, totaling 644 mm (25.4 in) over the 31 days, and enjoy the relatively high humidity levels averaging at 65%.

May Temperature in Santo Tomas La Union

In May in Santo Tomas La Union, the average temperature is 18°C (65°F). The maximum can reach 26°C (79°F), while the minimum can drop to as low as 13°C (55°F). This pleasant climate makes Santo Tomas La Union an ideal destination for travelers seeking comfortable weather and outdoor activities.

May Weather in Santo Tomas La Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Santo Tomas La Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Tomas La Union, May typically has an average temperature of 18°C (65°F), with highs reaching up to 26°C (79°F) and lows dropping to around 13°C (55°F).

Data source: Temperature data for Santo Tomas La Union generated using information from the Copernicus Climate Change Service.

May Precipitation in Santo Tomas La Union

In Santo Tomas La Union in May, the total precipitation amount is 644 mm (25.4 in) accumulated over 31 days.

May Precipitation Trends in Santo Tomas La Union

The chart displays monthly precipitation patterns in Santo Tomas La Union, 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 Santo Tomas La Union, May typically receives around 644 mm (25.4 inches) of precipitation spread over approximately 31 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 Santo Tomas La Union

In Santo Tomas La Union in May, humidity is 65%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace that clings to your skin, making you feel slightly sticky as you explore. It's comfortable enough for sightseeing, but breathable enough to enjoy a leisurely stroll, though you might find yourself seeking shade during the warmest parts of the day.

May Average Humidity in Santo Tomas La Union

This chart illustrates the average monthly humidity levels in Santo Tomas La Union, 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 Santo Tomas La Union 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 Santo Tomas La Union

In Santo Tomas La Union 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 Santo Tomas La Union, you can check here.

Maximum UV Index Levels in Santo Tomas La Union for May

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

Data source: Santo Tomas La Union 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 Santo Tomas La Union Compares to Other Months

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

This table compares monthly weather conditions in Santo Tomas La Union, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (63°F)	32 mm (1.2 inches)	76%	extreme
February Weather	17°C (63°F)	59 mm (2.3 inches)	68%	extreme
March Weather	18°C (64°F)	110 mm (4.3 inches)	59%	extreme
April Weather	18°C (65°F)	246 mm (9.7 inches)	57%	extreme
May Weather	18°C (65°F)	644 mm (25.4 inches)	65%	extreme
June Weather	18°C (65°F)	477 mm (18.8 inches)	66%	extreme
July Weather	19°C (66°F)	258 mm (10.2 inches)	75%	extreme
August Weather	18°C (65°F)	414 mm (16.3 inches)	82%	extreme
September Weather	18°C (65°F)	457 mm (18.0 inches)	82%	extreme
October Weather	18°C (65°F)	373 mm (14.7 inches)	83%	extreme
November Weather	18°C (64°F)	122 mm (4.8 inches)	80%	extreme
December Weather	17°C (63°F)	48 mm (1.9 inches)	76%	very high