May Weather in Alto, United States

Last updated: June 24, 2025

In Alto, United States, the average temperature in May hovers around 21°C (70°F). Expect a minimum chill of 5°C (41°F) and a warm peak at 34°C (93°F). This month typically sees 132 mm (5.2 in) of precipitation spread over about 10 days, contributing to an average humidity level of 85%.

May Temperature in Alto

In May in Alto, the average temperature is 21°C (70°F). Maximums can reach 34°C (93°F), while minimums can drop as low as 5°C (41°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for both warm and cooler temperatures.

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

The chart illustrates May temperature patterns in Alto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alto, May typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).

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

May Precipitation in Alto

In Alto in May, the total precipitation amount is 132 mm (5.2 in) over a span of 10 days.

May Precipitation Trends in Alto

The chart displays monthly precipitation patterns in Alto, 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 Alto, May typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 10 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 Alto

In Alto in May, humidity is 85%. With an average temperature of 21°C (70°F), this humidity feels like a warm, heavy blanket enveloping you, making travel feel slightly stifling and requiring frequent breaks to refresh in the shade or near water.

May Average Humidity in Alto

This chart illustrates the average monthly humidity levels in Alto, 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 Alto is approximately 85%, 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 Alto

In Alto in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Alto.

Maximum UV Index Levels in Alto for May

The chart shows the monthly maximum UV Index (UVI) for Alto 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 Alto typically reaches 11, which falls under the extreme exposure category.

Data source: Alto 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 Alto Compares to Other Months

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

This table compares monthly weather conditions in Alto, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	115 mm (4.5 inches)	86%	moderate
February Weather	9°C (49°F)	164 mm (6.5 inches)	86%	high
March Weather	12°C (54°F)	129 mm (5.1 inches)	86%	very high
April Weather	16°C (61°F)	130 mm (5.1 inches)	82%	extreme
May Weather	21°C (70°F)	132 mm (5.2 inches)	85%	extreme
June Weather	24°C (75°F)	112 mm (4.4 inches)	85%	extreme
July Weather	26°C (79°F)	102 mm (4.0 inches)	83%	extreme
August Weather	25°C (78°F)	135 mm (5.3 inches)	76%	very high
September Weather	23°C (74°F)	125 mm (4.9 inches)	76%	very high
October Weather	18°C (65°F)	168 mm (6.6 inches)	80%	very high
November Weather	11°C (52°F)	87 mm (3.4 inches)	88%	high
December Weather	8°C (47°F)	146 mm (5.7 inches)	88%	moderate