May Weather in Casillas, Guatemala

Last updated: August 23, 2025

In Casillas, Guatemala during May, the average temperature hovers around 21°C (69°F), with a minimum of 14°C (57°F) and a maximum soaring to 32°C (90°F). Expect precipitation to reach about 257 mm (10.1 in) over 26 days, accompanied by an average humidity level of 65%. Embrace the unique climate as you plan your adventures!

May Temperature in Casillas

In May in Casillas, the average temperature is 21°C (69°F), with maximums reaching 32°C (90°F) and minimums dropping as low as 14°C (57°F). This pleasant climate makes Casillas an ideal destination for outdoor activities and sightseeing during this time of year.

May Weather in Casillas: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Casillas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casillas, May typically has an average temperature of 21°C (69°F), with highs reaching up to 32°C (90°F) and lows dropping to around 14°C (57°F).

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

May Precipitation in Casillas

In Casillas in May, the precipitation amount is 257 mm (10.1 in) occurring over a span of 26 days.

May Precipitation Trends in Casillas

The chart displays monthly precipitation patterns in Casillas, 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 Casillas, May typically receives around 257 mm (10.1 inches) of precipitation spread over approximately 26 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 Casillas

In Casillas in May humidity is 65%. With an average temperature of 21°C (69°F), this humidity feels like a balmy embrace, making outdoor excursions refreshing yet slightly sticky, so travelers should stay hydrated and take breaks in shaded areas to fully enjoy their adventures.

May Average Humidity in Casillas

This chart illustrates the average monthly humidity levels in Casillas, 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 Casillas 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 Casillas

In Casillas 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 Casillas, you can check here.

Maximum UV Index Levels in Casillas for May

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

Data source: Casillas 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 Casillas Compares to Other Months

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

This table compares monthly weather conditions in Casillas, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	8 mm (0.3 inches)	76%	extreme
February Weather	19°C (66°F)	9 mm (0.4 inches)	68%	extreme
March Weather	20°C (68°F)	7 mm (0.3 inches)	59%	extreme
April Weather	21°C (70°F)	62 mm (2.5 inches)	57%	extreme
May Weather	21°C (69°F)	257 mm (10.1 inches)	65%	extreme
June Weather	20°C (68°F)	378 mm (14.9 inches)	66%	extreme
July Weather	20°C (68°F)	170 mm (6.7 inches)	75%	extreme
August Weather	20°C (68°F)	258 mm (10.2 inches)	82%	extreme
September Weather	20°C (68°F)	314 mm (12.4 inches)	82%	extreme
October Weather	19°C (67°F)	287 mm (11.3 inches)	83%	extreme
November Weather	19°C (66°F)	52 mm (2.0 inches)	80%	very high
December Weather	18°C (65°F)	17 mm (0.7 inches)	76%	very high