May Weather in South Tucson, United States

Last updated: June 24, 2025

In May, the average temperature in South Tucson, United States is a pleasant 25°C (78°F). While it can dip to a cool 9°C (48°F), temperatures can also soar to a sweltering 40°C (104°F). Expect minimal rainfall, with only 3 mm (0.1 in) of precipitation spread over 1 day. Humidity levels average around 40%, making for a comfortable climate overall.

May Temperature in South Tucson

In May in South Tucson, the average temperature is 25°C (78°F). The maximum can reach 40°C (104°F), while the minimum can be as low as 9°C (48°F). This weather makes South Tucson a great destination for travelers seeking warm days and cool evenings.

May Weather in South Tucson: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South Tucson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Tucson, May typically has an average temperature of 25°C (78°F), with highs reaching up to 40°C (104°F) and lows dropping to around 9°C (48°F).

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

May Precipitation in South Tucson

In South Tucson in May, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

May Precipitation Trends in South Tucson

The chart displays monthly precipitation patterns in South Tucson, 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 South Tucson, May typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 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 South Tucson

In South Tucson in May humidity is 40%. With an average temperature of 25°C (78°F), this humidity feels like a comfortable breeze that enhances the warmth, making it perfect for exploring the sights and enjoying outdoor activities without feeling overheated.

May Average Humidity in South Tucson

This chart illustrates the average monthly humidity levels in South Tucson, 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 South Tucson is approximately 40%, 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 South Tucson

In South Tucson in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in South Tucson.

Maximum UV Index Levels in South Tucson for May

The chart shows the monthly maximum UV Index (UVI) for South Tucson 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 South Tucson typically reaches 12, which falls under the extreme exposure category.

Data source: South Tucson 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 South Tucson Compares to Other Months

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

This table compares monthly weather conditions in South Tucson, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (53°F)	23 mm (0.9 inches)	76%	moderate
February Weather	13°C (55°F)	34 mm (1.3 inches)	79%	high
March Weather	16°C (62°F)	15 mm (0.6 inches)	67%	very high
April Weather	22°C (71°F)	2 mm (0.1 inches)	55%	extreme
May Weather	25°C (78°F)	3 mm (0.1 inches)	40%	extreme
June Weather	31°C (88°F)	8 mm (0.3 inches)	33%	extreme
July Weather	31°C (88°F)	54 mm (2.1 inches)	34%	extreme
August Weather	31°C (87°F)	35 mm (1.4 inches)	48%	extreme
September Weather	28°C (83°F)	27 mm (1.1 inches)	64%	extreme
October Weather	23°C (73°F)	10 mm (0.4 inches)	67%	very high
November Weather	17°C (64°F)	14 mm (0.6 inches)	77%	high
December Weather	12°C (54°F)	27 mm (1.0 inches)	82%	moderate