May Weather in Alto, United States

Last updated: June 24, 2025

In May, the average temperature in Alto, United States is a mild 14°C (58°F). However, temperatures can swing dramatically, with a minimum of -2°C (29°F) and a maximum peaking at 33°C (92°F). Expect about 116 mm (4.6 in) of precipitation over approximately 12 days, contributing to an average humidity of 78%. Perfect for cozy indoor activities or enjoying the fresh air!

May Temperature in Alto

In May in Alto, the average temperature is 14°C (58°F). The maximum can reach 33°C (92°F), while the minimum can drop as low as -2°C (29°F). It's advisable to pack for a range of weather conditions when traveling during this month.

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 14°C (58°F), with highs reaching up to 33°C (92°F) and lows dropping to around -2°C (29°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 precipitation amount is 116 mm (4.6 in) over a span of 12 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 116 mm (4.6 inches) of precipitation spread over approximately 12 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 Alto

In Alto in May, humidity is 78%. With an average temperature of 14°C (58°F), this humidity feels like a damp embrace, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat more than usual while exploring.

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 78%, 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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, 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 9, which falls under the very high 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 (20°F)	46 mm (1.8 inches)	85%	moderate
February Weather	-6°C (21°F)	48 mm (1.9 inches)	85%	moderate
March Weather	1°C (34°F)	59 mm (2.3 inches)	85%	moderate
April Weather	7°C (44°F)	99 mm (3.9 inches)	85%	very high
May Weather	14°C (58°F)	116 mm (4.6 inches)	78%	very high
June Weather	21°C (69°F)	105 mm (4.1 inches)	80%	very high
July Weather	23°C (74°F)	104 mm (4.1 inches)	78%	very high
August Weather	21°C (71°F)	98 mm (3.9 inches)	76%	very high
September Weather	18°C (64°F)	85 mm (3.3 inches)	79%	high
October Weather	10°C (51°F)	105 mm (4.1 inches)	83%	moderate
November Weather	2°C (36°F)	46 mm (1.8 inches)	88%	moderate
December Weather	-2°C (28°F)	47 mm (1.9 inches)	81%	low